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Title: South University - BIO BIO1011 AP Week 8 Quiz
Description: South University - BIO BIO1011 AP Week 8 Quiz Grading Summary Grade Details - All Questions 1. Question : neurons are small and have no anatomical features that distinguish dendrites from axons. Student Answer: Bipolar Anaxonic Multipolar Unipolar none of the above Points Received: 1 of 1 Comments: 2. Question : How would the absolute refractory period be affected if voltage-regulated sodium channels failed to inactivate? Student Answer: It would be basically unaffected. It would be much briefer. It would last indefinitely. Points Received: 1 of 1 Comments: 3. Question : Each of the following is an example of a neuroeffector junction, except the junction between a neuron and a(n) Student Answer: endocrine gland cell. nerve cell. smooth muscle cell. exocrine gland cell. skeletal muscle cell. Points Received: 1 of 1 Comments: 4. Question : Neurons that have one axon and one dendrite, with the soma in between, are called Student Answer: tripolar. multipolar. bipolar. unipolar. anaxonic. Points Received: 1 of 1 Comments: 5. Question : The is a strand of fibrous tissue that provides longitudinal support as a component of the coccygeal ligament. Student Answer: dorsal root conus medullaris cauda equina filum terminale ventral root 6. Question : The cytoplasm that surrounds the nucleus of a neuron is called the Student Answer: perikaryon. nucleoplasm. neuroplasm. protoplasm. sarcoplasm. 7. Question : Any stimulus that opens ion channel will produce a graded potential. Student Answer: a chemically gated a mechanically gated a voltage-gated a sodium any of the above 8. Question : neurons form the afferent division of the PNS. Student Answer: Somatic sensory Visceral sensory Neural sensory Sensory none of the above 9. Question : Neurotransmitter for release is stored in synaptic Student Answer: vesicles. telodendria. knobs. neurosomes. mitochondria. 10. Question : Which of the following are a type of glial cell found in the peripheral nervous system? Student Answer: oligodendrocytes astrocytes satellite cells ependymal cells microglia Points Received: 1 of 1 Comments: 11. Question : The preganglionic fibers that connect a spinal nerve with an autonomic ganglion in the thoracic and lumbar region of the spinal cord form the Student Answer: dorsal ramus. gray rami communicantes. dermatomes. ventral ramus. white rami communicantes. 12. Question : All of the following are true of neural reflexes, except that they Student Answer: are the simplest form of behavior. help preserve homeostasis. are automatic motor responses. involve at least two neurons. cannot be modified by the brain. 13. Question : Figure 13-1 The Spinal Cord Use Figure 13-1 to answer the following questions: Identify the structure labeled "10." Student Answer: anterior white horn anterior gray commissure anterior median fissure anterior white commissure anterior white column 14. Question : Neurons that have several dendrites and a single axon are called Student Answer: tripolar. anaxonic. bipolar. unipolar. multipolar. 15. Question : The largest and most numerous neuroglia in the CNS are the Student Answer: ependymal cells. astrocytes. oligodendrocytes. microglia. none of the above 16. Question : The flexor reflex Student Answer: prevents a muscle from generating damaging tension. prevents a muscle from overstretching. is an example of a monosynaptic reflex. usually depends on cranial neurons. moves a limb away from a painful stimulus. 17. Question : The ion that triggers the release of acetylcholine into the synaptic cleft is Student Answer: calcium. sodium. potassium. magnesium. chloride. 18. Question : Which of the following is true regarding an epidural block? Student Answer: It is commonly used as a method of pain control during labor and delivery. It affects only the spinal nerves in the immediate area of the injection. It provides mainly sensory anesthesia. It can be difficult to achieve in the upper cervical and midthoracic region. all of the above 19. Question : Deteriorating changes in the distal segment of an axon as a result of a break between it and the soma is called degeneration. Student Answer: conduction peripheral Wallerian neural central 20. Question : In the process of continuous action potential propagation, Student Answer: the action potential is triggered by graded depolarization of the initial segment. at threshold, sodium channels begin to open rapidly. local currents depolarize the region just adjacent to the active zone. local currents depolarize a sensitive spot distant from the active zone. A, B, and C 21. Question : Somatic motor neurons in the spinal cord control all of the following muscles, except those that Student Answer: move the forearm and hand. move the arm. position the pectoral girdle. move the neck. move the hand and fingers. 22. Question : Sensory neurons of the PNS are Student Answer: tripolar. unipolar. bipolar. anaxonic. multipolar. 23. Question : Which of the following types of nerve fiber possesses the fastest speed of impulse propagation? Student Answer: type A type B type C type D type E 24. Question : Axons crossing from one side of the spinal cord to the other within the gray matter are found in the Student Answer: gray commissures. white commissures. lateral gray horns. anterior gray horns. posterior gray horns. 25. Question : Which of the following is the most important excitatory neurotransmitter in the brain? Student Answer: glutamate noradrenaline glycine gamma aminobutyric acid serotonin 26. Question : Which of the following comparisons between neurons and muscle tissue is false? Student Answer: Action potentials last longer in muscle fibers. Muscle fibers conduct action potentials at slow speeds. Muscle fibers conduct action potentials only by continuous propagation. Resting potentials are greater in muscle fibers. Action potentials are briefer in muscle fibers. 27. Question : Samples of CSF for diagnostic purposes are normally obtained by placing the tip of a needle in the Student Answer: epidural space. arachnoid mater. cerebral ventricles. subarachnoid space. dura mater. 28. Question : In the peripheral nervous system, Schwann cells participate in the repair of damaged nerves by Student Answer: regenerating cell bodies for the neurons. producing new axons. clearing away cellular debris. producing more satellite cells that fuse to form new axons. forming a cellular cord that directs axonal regrowth. 29. Question : The part of the peripheral nervous system that carries sensory information to the CNS is designated Student Answer: afferent. autonomic. motor. somatic. efferent. 30. Question : The efferent division of the peripheral nervous system innervates: Student Answer: heart muscle cells skeletal muscle cells glandular cells smooth muscle cells all of the above 31. Question : Figure 13-1 The Spinal Cord Use Figure 13-1 to answer the following questions: Identify the structure labeled "1." Student Answer: median commissure posterior white column anterior white column lateral white column lateral white horn 32. Question : Neurons that are rare, small, and lack features that distinguish dendrites from axons are called Student Answer: anaxonic. bipolar. tripolar. multipolar. unipolar. 33. Question : The complex, interwoven network formed by contributions from the ventral rami of neighboring spinal nerves is termed a(n) Student Answer: lateral nerve. tract. dermatome. autonomic nerve. plexus. 34. Question : Type fibers have the largest diameter axons. Student Answer: A F B S C 35. Question : In which of the following would the rate of impulse conduction be the greatest? Student Answer: a nonmyelinated fiber of 20-µm diameter a myelinated fiber of 10-µm diameter a myelinated fiber of 1-µm diameter a nonmyelinated fiber of 10-µm diameter the same in all because of the all-or-none principle 36. Question : The nervous system controls the skeletal muscles. Student Answer: afferent somatic sympathetic autonomic parasympathetic 37. Question : Extensive damage to oligodendrocytes in the CNS could result in Student Answer: inability to produce scar tissue at the site of an injury. loss of sensation and motor control. loss of the structural framework of the brain. decreased production of cerebrospinal fluid. a breakdown of the blood-brain barrier. 38. Question : The same can have different effects depending on the properties of the . Student Answer: neurotransmitter; receptor hormone; neurotransmitter receptor; neurotransmitter substrate; receptor propagation; neurotransmitter 39. Question : Presynaptic facilitation by serotonin is caused by Student Answer: increased extracellular concentration of potassium ion. increased extracellular concentration of sodium ion. temporal summation. blockage of calcium channels in the presynaptic membrane. calcium channels in the presynaptic membrane remaining open longer. 40. Question : If the dorsal root of a spinal nerve is severed, Student Answer: output to visceral organs would be blocked. sensory input would be blocked. output to skeletal muscles would be blocked. the brain would not be able to communicate with that level of the spinal cord. the spinal cord would not be able to process information at that level. 41. Question : The reflex that prevents a muscle from exerting too much tension is the reflex. Student Answer: tendon flexor reciprocal crossed extensor stretch 42. Question : The layer of the meninges in direct contact with the spinal cord is the Student Answer: subarachnoid space. choroid plexus. dura mater. arachnoid. pia mater. 43. Question : The site of intercellular communication between neurons is the Student Answer: hillock. collateral. synaptic knob. telodendria. synapse. 44. Question : Figure 12-1 The Neuron Use Figure 12-1 to answer the following questions: The structure labeled "2" is a Student Answer: perikaryon. soma. initial segment. Nissl body. dendrite. 45. Question : Summation that results from the cumulative effect of multiple synapses at multiple places on the neuron is designated Student Answer: impulse transmission. spatial summation. inhibition of the impulse. hyperpolarization. temporal summation. 46. Question : open or close in response to binding specific molecules. Student Answer: Chemically gated channels Leak channels Activated channels Voltage-gated channels both C and D 47. Question : Which of the following is a function of neuroglia? Student Answer: act as phagocytes produce cerebrospinal fluid regulate the composition of interstitial fluid provide a supportive framework all of the above 48. Question : EPSPs (excitatory postsynaptic potentials) occur when Student Answer: more potassium ions than usual leak out of a cell. more calcium ions than usual leak out of a cell. chloride ions enter a cell. hyperpolarizations occur. extra sodium ions enter a cell. 49. Question : The spinal cord consists of five regions and segments. Student Answer: 25 12 5 31 number varies widely among individuals 50. Question : After acetylcholinesterase acts, the synaptic knob Student Answer: reabsorbs the choline. reabsorbs the acetylcholine. reabsorbs the acetate. all of the above both B and C 51. Question : Muscles of the neck and shoulder are innervated by spinal nerves from the region. Student Answer: cervical coccygeal lumbar thoracic sacral 52. Question : The site in the neuron where EPSPs and IPSPs are integrated is the Student Answer: axon hillock. dendritic membrane. synaptic knob. chemical synapse. electrical synapse. 53. Question : Which of the following is not a function of the neuroglia? Student Answer: support memory phagocytosis maintenance of blood-brain barrier secretion of cerebrospinal fluid 54. Question : If the potassium permeability of a resting neuron increases above the resting permeability, what effect will this have on the transmembrane potential? Student Answer: The membrane will become depolarized. The inside of the membrane will become more positive. There will be almost no effect on transmembrane potential. The inside of the membrane will become more negative. both B and D 55. Question : Which type of synapse is most common in the nervous system? Student Answer: processing radiative chemical mechanical electrical 56. Question : Cerebrospinal fluid flows within the Student Answer: subarachnoid space. filum terminale. dura mater. pia mater. arachnoid mater. 57. Question : The white matter of the spinal cord is mainly Student Answer: nodes of Ranvier. Schwann cells. unmyelinated axons. neuroglia. myelinated axons. 58. Question : The nerve, which arises in the cervical plexus, innervates the diaphragm. Student Answer: sciatic ansa cervicalis * Times are displayed in (GMT-07:00) Mountain Time (US & Canada)
Description: South University - BIO BIO1011 AP Week 8 Quiz Grading Summary Grade Details - All Questions 1. Question : neurons are small and have no anatomical features that distinguish dendrites from axons. Student Answer: Bipolar Anaxonic Multipolar Unipolar none of the above Points Received: 1 of 1 Comments: 2. Question : How would the absolute refractory period be affected if voltage-regulated sodium channels failed to inactivate? Student Answer: It would be basically unaffected. It would be much briefer. It would last indefinitely. Points Received: 1 of 1 Comments: 3. Question : Each of the following is an example of a neuroeffector junction, except the junction between a neuron and a(n) Student Answer: endocrine gland cell. nerve cell. smooth muscle cell. exocrine gland cell. skeletal muscle cell. Points Received: 1 of 1 Comments: 4. Question : Neurons that have one axon and one dendrite, with the soma in between, are called Student Answer: tripolar. multipolar. bipolar. unipolar. anaxonic. Points Received: 1 of 1 Comments: 5. Question : The is a strand of fibrous tissue that provides longitudinal support as a component of the coccygeal ligament. Student Answer: dorsal root conus medullaris cauda equina filum terminale ventral root 6. Question : The cytoplasm that surrounds the nucleus of a neuron is called the Student Answer: perikaryon. nucleoplasm. neuroplasm. protoplasm. sarcoplasm. 7. Question : Any stimulus that opens ion channel will produce a graded potential. Student Answer: a chemically gated a mechanically gated a voltage-gated a sodium any of the above 8. Question : neurons form the afferent division of the PNS. Student Answer: Somatic sensory Visceral sensory Neural sensory Sensory none of the above 9. Question : Neurotransmitter for release is stored in synaptic Student Answer: vesicles. telodendria. knobs. neurosomes. mitochondria. 10. Question : Which of the following are a type of glial cell found in the peripheral nervous system? Student Answer: oligodendrocytes astrocytes satellite cells ependymal cells microglia Points Received: 1 of 1 Comments: 11. Question : The preganglionic fibers that connect a spinal nerve with an autonomic ganglion in the thoracic and lumbar region of the spinal cord form the Student Answer: dorsal ramus. gray rami communicantes. dermatomes. ventral ramus. white rami communicantes. 12. Question : All of the following are true of neural reflexes, except that they Student Answer: are the simplest form of behavior. help preserve homeostasis. are automatic motor responses. involve at least two neurons. cannot be modified by the brain. 13. Question : Figure 13-1 The Spinal Cord Use Figure 13-1 to answer the following questions: Identify the structure labeled "10." Student Answer: anterior white horn anterior gray commissure anterior median fissure anterior white commissure anterior white column 14. Question : Neurons that have several dendrites and a single axon are called Student Answer: tripolar. anaxonic. bipolar. unipolar. multipolar. 15. Question : The largest and most numerous neuroglia in the CNS are the Student Answer: ependymal cells. astrocytes. oligodendrocytes. microglia. none of the above 16. Question : The flexor reflex Student Answer: prevents a muscle from generating damaging tension. prevents a muscle from overstretching. is an example of a monosynaptic reflex. usually depends on cranial neurons. moves a limb away from a painful stimulus. 17. Question : The ion that triggers the release of acetylcholine into the synaptic cleft is Student Answer: calcium. sodium. potassium. magnesium. chloride. 18. Question : Which of the following is true regarding an epidural block? Student Answer: It is commonly used as a method of pain control during labor and delivery. It affects only the spinal nerves in the immediate area of the injection. It provides mainly sensory anesthesia. It can be difficult to achieve in the upper cervical and midthoracic region. all of the above 19. Question : Deteriorating changes in the distal segment of an axon as a result of a break between it and the soma is called degeneration. Student Answer: conduction peripheral Wallerian neural central 20. Question : In the process of continuous action potential propagation, Student Answer: the action potential is triggered by graded depolarization of the initial segment. at threshold, sodium channels begin to open rapidly. local currents depolarize the region just adjacent to the active zone. local currents depolarize a sensitive spot distant from the active zone. A, B, and C 21. Question : Somatic motor neurons in the spinal cord control all of the following muscles, except those that Student Answer: move the forearm and hand. move the arm. position the pectoral girdle. move the neck. move the hand and fingers. 22. Question : Sensory neurons of the PNS are Student Answer: tripolar. unipolar. bipolar. anaxonic. multipolar. 23. Question : Which of the following types of nerve fiber possesses the fastest speed of impulse propagation? Student Answer: type A type B type C type D type E 24. Question : Axons crossing from one side of the spinal cord to the other within the gray matter are found in the Student Answer: gray commissures. white commissures. lateral gray horns. anterior gray horns. posterior gray horns. 25. Question : Which of the following is the most important excitatory neurotransmitter in the brain? Student Answer: glutamate noradrenaline glycine gamma aminobutyric acid serotonin 26. Question : Which of the following comparisons between neurons and muscle tissue is false? Student Answer: Action potentials last longer in muscle fibers. Muscle fibers conduct action potentials at slow speeds. Muscle fibers conduct action potentials only by continuous propagation. Resting potentials are greater in muscle fibers. Action potentials are briefer in muscle fibers. 27. Question : Samples of CSF for diagnostic purposes are normally obtained by placing the tip of a needle in the Student Answer: epidural space. arachnoid mater. cerebral ventricles. subarachnoid space. dura mater. 28. Question : In the peripheral nervous system, Schwann cells participate in the repair of damaged nerves by Student Answer: regenerating cell bodies for the neurons. producing new axons. clearing away cellular debris. producing more satellite cells that fuse to form new axons. forming a cellular cord that directs axonal regrowth. 29. Question : The part of the peripheral nervous system that carries sensory information to the CNS is designated Student Answer: afferent. autonomic. motor. somatic. efferent. 30. Question : The efferent division of the peripheral nervous system innervates: Student Answer: heart muscle cells skeletal muscle cells glandular cells smooth muscle cells all of the above 31. Question : Figure 13-1 The Spinal Cord Use Figure 13-1 to answer the following questions: Identify the structure labeled "1." Student Answer: median commissure posterior white column anterior white column lateral white column lateral white horn 32. Question : Neurons that are rare, small, and lack features that distinguish dendrites from axons are called Student Answer: anaxonic. bipolar. tripolar. multipolar. unipolar. 33. Question : The complex, interwoven network formed by contributions from the ventral rami of neighboring spinal nerves is termed a(n) Student Answer: lateral nerve. tract. dermatome. autonomic nerve. plexus. 34. Question : Type fibers have the largest diameter axons. Student Answer: A F B S C 35. Question : In which of the following would the rate of impulse conduction be the greatest? Student Answer: a nonmyelinated fiber of 20-µm diameter a myelinated fiber of 10-µm diameter a myelinated fiber of 1-µm diameter a nonmyelinated fiber of 10-µm diameter the same in all because of the all-or-none principle 36. Question : The nervous system controls the skeletal muscles. Student Answer: afferent somatic sympathetic autonomic parasympathetic 37. Question : Extensive damage to oligodendrocytes in the CNS could result in Student Answer: inability to produce scar tissue at the site of an injury. loss of sensation and motor control. loss of the structural framework of the brain. decreased production of cerebrospinal fluid. a breakdown of the blood-brain barrier. 38. Question : The same can have different effects depending on the properties of the . Student Answer: neurotransmitter; receptor hormone; neurotransmitter receptor; neurotransmitter substrate; receptor propagation; neurotransmitter 39. Question : Presynaptic facilitation by serotonin is caused by Student Answer: increased extracellular concentration of potassium ion. increased extracellular concentration of sodium ion. temporal summation. blockage of calcium channels in the presynaptic membrane. calcium channels in the presynaptic membrane remaining open longer. 40. Question : If the dorsal root of a spinal nerve is severed, Student Answer: output to visceral organs would be blocked. sensory input would be blocked. output to skeletal muscles would be blocked. the brain would not be able to communicate with that level of the spinal cord. the spinal cord would not be able to process information at that level. 41. Question : The reflex that prevents a muscle from exerting too much tension is the reflex. Student Answer: tendon flexor reciprocal crossed extensor stretch 42. Question : The layer of the meninges in direct contact with the spinal cord is the Student Answer: subarachnoid space. choroid plexus. dura mater. arachnoid. pia mater. 43. Question : The site of intercellular communication between neurons is the Student Answer: hillock. collateral. synaptic knob. telodendria. synapse. 44. Question : Figure 12-1 The Neuron Use Figure 12-1 to answer the following questions: The structure labeled "2" is a Student Answer: perikaryon. soma. initial segment. Nissl body. dendrite. 45. Question : Summation that results from the cumulative effect of multiple synapses at multiple places on the neuron is designated Student Answer: impulse transmission. spatial summation. inhibition of the impulse. hyperpolarization. temporal summation. 46. Question : open or close in response to binding specific molecules. Student Answer: Chemically gated channels Leak channels Activated channels Voltage-gated channels both C and D 47. Question : Which of the following is a function of neuroglia? Student Answer: act as phagocytes produce cerebrospinal fluid regulate the composition of interstitial fluid provide a supportive framework all of the above 48. Question : EPSPs (excitatory postsynaptic potentials) occur when Student Answer: more potassium ions than usual leak out of a cell. more calcium ions than usual leak out of a cell. chloride ions enter a cell. hyperpolarizations occur. extra sodium ions enter a cell. 49. Question : The spinal cord consists of five regions and segments. Student Answer: 25 12 5 31 number varies widely among individuals 50. Question : After acetylcholinesterase acts, the synaptic knob Student Answer: reabsorbs the choline. reabsorbs the acetylcholine. reabsorbs the acetate. all of the above both B and C 51. Question : Muscles of the neck and shoulder are innervated by spinal nerves from the region. Student Answer: cervical coccygeal lumbar thoracic sacral 52. Question : The site in the neuron where EPSPs and IPSPs are integrated is the Student Answer: axon hillock. dendritic membrane. synaptic knob. chemical synapse. electrical synapse. 53. Question : Which of the following is not a function of the neuroglia? Student Answer: support memory phagocytosis maintenance of blood-brain barrier secretion of cerebrospinal fluid 54. Question : If the potassium permeability of a resting neuron increases above the resting permeability, what effect will this have on the transmembrane potential? Student Answer: The membrane will become depolarized. The inside of the membrane will become more positive. There will be almost no effect on transmembrane potential. The inside of the membrane will become more negative. both B and D 55. Question : Which type of synapse is most common in the nervous system? Student Answer: processing radiative chemical mechanical electrical 56. Question : Cerebrospinal fluid flows within the Student Answer: subarachnoid space. filum terminale. dura mater. pia mater. arachnoid mater. 57. Question : The white matter of the spinal cord is mainly Student Answer: nodes of Ranvier. Schwann cells. unmyelinated axons. neuroglia. myelinated axons. 58. Question : The nerve, which arises in the cervical plexus, innervates the diaphragm. Student Answer: sciatic ansa cervicalis * Times are displayed in (GMT-07:00) Mountain Time (US & Canada)
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Page 1 of 25
South University - BIO BIO1011 AP Week 8 Quiz
Grading Summary
These are the automatically computed results of
your exam
...
Date and Time Started:
Time Spent:
Points Received:
Question Type:
5/14/2014 11:01:25 PM
1 h , 25 min , 02 secs
57 / 60 (95%)
# Of Questions:
Multiple Choice
60
# Correct:
57
Grade Details - All Questions
1
...
Student Answer:
Bipolar
Anaxonic
Multipolar
Unipolar
none of the above
Points Received:
1 of 1
Comments:
2
...
It would be much briefer
...
Points Received:
1 of 1
Comments:
3
...
nerve cell
...
exocrine gland cell
...
Points Received:
1 of 1
Comments:
4
...
multipolar
...
unipolar
...
Points Received:
1 of 1
Comments:
5
...
dorsal root
conus medullaris
5/26/2014
Page 2 of 25
cauda equina
filum terminale
ventral root
Points Received:
1 of 1
Comments:
6
...
nucleoplasm
...
protoplasm
...
Points Received:
1 of 1
Comments:
7
...
a chemically gated
a mechanically gated
a voltage-gated
a sodium
any of the above
Points Received:
1 of 1
Comments:
8
...
Somatic sensory
Visceral sensory
Neural sensory
Sensory
none of the above
Points Received:
1 of 1
Comments:
9
...
telodendria
...
neurosomes
...
Points Received:
1 of 1
Comments:
10
...
Question :
Student Answer:
The preganglionic fibers that connect a spinal nerve with an autonomic ganglion in the thoracic
and lumbar region of the spinal cord form the
dorsal ramus
...
dermatomes
...
white rami communicantes
...
Question :
Student Answer:
All of the following are true of neural reflexes, except that they
are the simplest form of behavior
...
are automatic motor responses
...
cannot be modified by the brain
...
Question :
Figure 13-1 The Spinal Cord
Use Figure 13-1 to answer the following questions:
Identify the structure labeled "10
...
Question :
Neurons that have several dendrites and a single axon are called
5/26/2014
Page 4 of 25
Student Answer:
tripolar
...
bipolar
...
multipolar
...
Question :
Student Answer:
The largest and most numerous neuroglia in the CNS are the
ependymal cells
...
oligodendrocytes
...
none of the above
Points Received:
1 of 1
Comments:
16
...
prevents a muscle from overstretching
...
usually depends on cranial neurons
...
Points Received:
1 of 1
Comments:
17
...
sodium
...
magnesium
...
Points Received:
1 of 1
Comments:
18
...
It affects only the spinal nerves in the immediate area of the injection
...
It can be difficult to achieve in the upper cervical and midthoracic region
...
Question :
Student Answer:
Deteriorating changes in the distal segment of an axon as a result of a break between it and the
soma is called
degeneration
...
Question :
Student Answer:
In the process of continuous action potential propagation,
the action potential is triggered by graded depolarization of the initial segment
...
local currents depolarize the region just adjacent to the active zone
...
A, B, and C
Points Received:
0 of 1
Comments:
21
...
move the arm
...
move the neck
...
Points Received:
1 of 1
Comments:
22
...
unipolar
...
anaxonic
...
Points Received:
1 of 1
Comments:
23
...
Question :
Student Answer:
Axons crossing from one side of the spinal cord to the other within the gray matter are found in
the
gray commissures
...
lateral gray horns
...
posterior gray horns
...
Question :
Student Answer:
Which of the following is the most important excitatory neurotransmitter in the brain?
glutamate
noradrenaline
glycine
gamma aminobutyric acid
serotonin
Points Received:
1 of 1
Comments:
26
...
Muscle fibers conduct action potentials at slow speeds
...
Resting potentials are greater in muscle fibers
...
Points Received:
1 of 1
Comments:
27
...
arachnoid mater
...
subarachnoid space
...
Points Received:
1 of 1
Comments:
28
...
producing new axons
...
producing more satellite cells that fuse to form new axons
...
Points Received:
1 of 1
Comments:
29
...
autonomic
...
somatic
...
Points Received:
1 of 1
Comments:
30
...
Question :
Figure 13-1 The Spinal Cord
Use Figure 13-1 to answer the following questions:
Identify the structure labeled "1
...
Question :
Student Answer:
Neurons that are rare, small, and lack features that distinguish dendrites from axons are called
anaxonic
...
tripolar
...
unipolar
...
Question :
Student Answer:
The complex, interwoven network formed by contributions from the ventral rami of neighboring
spinal nerves is termed a(n)
lateral nerve
...
dermatome
...
plexus
...
Question :
Type
Student Answer:
fibers have the largest diameter axons
...
Question :
In which of the following would the rate of impulse conduction be the greatest?
Student Answer:
a nonmyelinated fiber of 20-µm diameter
a myelinated fiber of 10-µm diameter
a myelinated fiber of 1-µm diameter
a nonmyelinated fiber of 10-µm diameter
the same in all because of the all-or-none principle
Points Received:
1 of 1
Comments:
36
...
afferent
somatic
sympathetic
autonomic
parasympathetic
Points Received:
1 of 1
Comments:
37
...
loss of sensation and motor control
...
decreased production of cerebrospinal fluid
...
Points Received:
1 of 1
Comments:
38
...
neurotransmitter; receptor
hormone; neurotransmitter
receptor; neurotransmitter
substrate; receptor
propagation; neurotransmitter
Points Received:
0 of 1
Comments:
39
...
increased extracellular concentration of sodium ion
...
blockage of calcium channels in the presynaptic membrane
...
Points Received:
1 of 1
Comments:
40
...
sensory input would be blocked
...
the brain would not be able to communicate with that level of the spinal cord
...
Points Received:
1 of 1
Comments:
41
...
tendon
flexor
reciprocal
crossed extensor
stretch
Points Received:
1 of 1
Comments:
42
...
choroid plexus
...
arachnoid
...
Points Received:
1 of 1
Comments:
43
...
collateral
...
telodendria
...
Points Received:
1 of 1
Comments:
44
...
soma
...
Nissl body
...
Points Received:
0 of 1
Comments:
45
...
spatial summation
...
hyperpolarization
...
Points Received:
1 of 1
Comments:
46
...
Chemically gated channels
Leak channels
Activated channels
Voltage-gated channels
both C and D
Points Received:
1 of 1
Comments:
47
...
Question :
Student Answer:
EPSPs (excitatory postsynaptic potentials) occur when
more potassium ions than usual leak out of a cell
...
chloride ions enter a cell
...
extra sodium ions enter a cell
...
Question :
Student Answer:
The spinal cord consists of five regions and
segments
...
Question :
Student Answer:
After acetylcholinesterase acts, the synaptic knob
reabsorbs the choline
...
reabsorbs the acetate
...
Question :
Student Answer:
Muscles of the neck and shoulder are innervated by spinal nerves from the
region
...
Question :
Student Answer:
The site in the neuron where EPSPs and IPSPs are integrated is the
axon hillock
...
synaptic knob
...
electrical synapse
...
Question :
Which of the following is not a function of the neuroglia?
Student Answer:
support
memory
phagocytosis
maintenance of blood-brain barrier
secretion of cerebrospinal fluid
Points Received:
1 of 1
Comments:
54
...
The inside of the membrane will become more positive
...
The inside of the membrane will become more negative
...
Question :
Which type of synapse is most common in the nervous system?
Student Answer:
processing
radiative
chemical
mechanical
electrical
Points Received:
1 of 1
Comments:
56
...
filum terminale
...
pia mater
...
Points Received:
1 of 1
Comments:
57
...
Schwann cells
...
neuroglia
...
Points Received:
1 of 1
Comments:
58
...
sciatic
ansa cervicalis
5/26/2014
Page 13 of 25
phrenic
lesser occipital
radial
Points Received:
1 of 1
Comments:
59
...
neurons are triggered to divide
...
action potentials are generated spontaneously
...
Points Received:
1 of 1
Comments:
60
...
autonomic motor nuclei
...
sympathetic nuclei
...
Points Received:
1 of 1
Comments:
* Times are displayed in (GMT-07:00) Mountain Time (US & Canada)
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Title: South University - BIO BIO1011 AP Week 8 Quiz
Description: South University - BIO BIO1011 AP Week 8 Quiz Grading Summary Grade Details - All Questions 1. Question : neurons are small and have no anatomical features that distinguish dendrites from axons. Student Answer: Bipolar Anaxonic Multipolar Unipolar none of the above Points Received: 1 of 1 Comments: 2. Question : How would the absolute refractory period be affected if voltage-regulated sodium channels failed to inactivate? Student Answer: It would be basically unaffected. It would be much briefer. It would last indefinitely. Points Received: 1 of 1 Comments: 3. Question : Each of the following is an example of a neuroeffector junction, except the junction between a neuron and a(n) Student Answer: endocrine gland cell. nerve cell. smooth muscle cell. exocrine gland cell. skeletal muscle cell. Points Received: 1 of 1 Comments: 4. Question : Neurons that have one axon and one dendrite, with the soma in between, are called Student Answer: tripolar. multipolar. bipolar. unipolar. anaxonic. Points Received: 1 of 1 Comments: 5. Question : The is a strand of fibrous tissue that provides longitudinal support as a component of the coccygeal ligament. Student Answer: dorsal root conus medullaris cauda equina filum terminale ventral root 6. Question : The cytoplasm that surrounds the nucleus of a neuron is called the Student Answer: perikaryon. nucleoplasm. neuroplasm. protoplasm. sarcoplasm. 7. Question : Any stimulus that opens ion channel will produce a graded potential. Student Answer: a chemically gated a mechanically gated a voltage-gated a sodium any of the above 8. Question : neurons form the afferent division of the PNS. Student Answer: Somatic sensory Visceral sensory Neural sensory Sensory none of the above 9. Question : Neurotransmitter for release is stored in synaptic Student Answer: vesicles. telodendria. knobs. neurosomes. mitochondria. 10. Question : Which of the following are a type of glial cell found in the peripheral nervous system? Student Answer: oligodendrocytes astrocytes satellite cells ependymal cells microglia Points Received: 1 of 1 Comments: 11. Question : The preganglionic fibers that connect a spinal nerve with an autonomic ganglion in the thoracic and lumbar region of the spinal cord form the Student Answer: dorsal ramus. gray rami communicantes. dermatomes. ventral ramus. white rami communicantes. 12. Question : All of the following are true of neural reflexes, except that they Student Answer: are the simplest form of behavior. help preserve homeostasis. are automatic motor responses. involve at least two neurons. cannot be modified by the brain. 13. Question : Figure 13-1 The Spinal Cord Use Figure 13-1 to answer the following questions: Identify the structure labeled "10." Student Answer: anterior white horn anterior gray commissure anterior median fissure anterior white commissure anterior white column 14. Question : Neurons that have several dendrites and a single axon are called Student Answer: tripolar. anaxonic. bipolar. unipolar. multipolar. 15. Question : The largest and most numerous neuroglia in the CNS are the Student Answer: ependymal cells. astrocytes. oligodendrocytes. microglia. none of the above 16. Question : The flexor reflex Student Answer: prevents a muscle from generating damaging tension. prevents a muscle from overstretching. is an example of a monosynaptic reflex. usually depends on cranial neurons. moves a limb away from a painful stimulus. 17. Question : The ion that triggers the release of acetylcholine into the synaptic cleft is Student Answer: calcium. sodium. potassium. magnesium. chloride. 18. Question : Which of the following is true regarding an epidural block? Student Answer: It is commonly used as a method of pain control during labor and delivery. It affects only the spinal nerves in the immediate area of the injection. It provides mainly sensory anesthesia. It can be difficult to achieve in the upper cervical and midthoracic region. all of the above 19. Question : Deteriorating changes in the distal segment of an axon as a result of a break between it and the soma is called degeneration. Student Answer: conduction peripheral Wallerian neural central 20. Question : In the process of continuous action potential propagation, Student Answer: the action potential is triggered by graded depolarization of the initial segment. at threshold, sodium channels begin to open rapidly. local currents depolarize the region just adjacent to the active zone. local currents depolarize a sensitive spot distant from the active zone. A, B, and C 21. Question : Somatic motor neurons in the spinal cord control all of the following muscles, except those that Student Answer: move the forearm and hand. move the arm. position the pectoral girdle. move the neck. move the hand and fingers. 22. Question : Sensory neurons of the PNS are Student Answer: tripolar. unipolar. bipolar. anaxonic. multipolar. 23. Question : Which of the following types of nerve fiber possesses the fastest speed of impulse propagation? Student Answer: type A type B type C type D type E 24. Question : Axons crossing from one side of the spinal cord to the other within the gray matter are found in the Student Answer: gray commissures. white commissures. lateral gray horns. anterior gray horns. posterior gray horns. 25. Question : Which of the following is the most important excitatory neurotransmitter in the brain? Student Answer: glutamate noradrenaline glycine gamma aminobutyric acid serotonin 26. Question : Which of the following comparisons between neurons and muscle tissue is false? Student Answer: Action potentials last longer in muscle fibers. Muscle fibers conduct action potentials at slow speeds. Muscle fibers conduct action potentials only by continuous propagation. Resting potentials are greater in muscle fibers. Action potentials are briefer in muscle fibers. 27. Question : Samples of CSF for diagnostic purposes are normally obtained by placing the tip of a needle in the Student Answer: epidural space. arachnoid mater. cerebral ventricles. subarachnoid space. dura mater. 28. Question : In the peripheral nervous system, Schwann cells participate in the repair of damaged nerves by Student Answer: regenerating cell bodies for the neurons. producing new axons. clearing away cellular debris. producing more satellite cells that fuse to form new axons. forming a cellular cord that directs axonal regrowth. 29. Question : The part of the peripheral nervous system that carries sensory information to the CNS is designated Student Answer: afferent. autonomic. motor. somatic. efferent. 30. Question : The efferent division of the peripheral nervous system innervates: Student Answer: heart muscle cells skeletal muscle cells glandular cells smooth muscle cells all of the above 31. Question : Figure 13-1 The Spinal Cord Use Figure 13-1 to answer the following questions: Identify the structure labeled "1." Student Answer: median commissure posterior white column anterior white column lateral white column lateral white horn 32. Question : Neurons that are rare, small, and lack features that distinguish dendrites from axons are called Student Answer: anaxonic. bipolar. tripolar. multipolar. unipolar. 33. Question : The complex, interwoven network formed by contributions from the ventral rami of neighboring spinal nerves is termed a(n) Student Answer: lateral nerve. tract. dermatome. autonomic nerve. plexus. 34. Question : Type fibers have the largest diameter axons. Student Answer: A F B S C 35. Question : In which of the following would the rate of impulse conduction be the greatest? Student Answer: a nonmyelinated fiber of 20-µm diameter a myelinated fiber of 10-µm diameter a myelinated fiber of 1-µm diameter a nonmyelinated fiber of 10-µm diameter the same in all because of the all-or-none principle 36. Question : The nervous system controls the skeletal muscles. Student Answer: afferent somatic sympathetic autonomic parasympathetic 37. Question : Extensive damage to oligodendrocytes in the CNS could result in Student Answer: inability to produce scar tissue at the site of an injury. loss of sensation and motor control. loss of the structural framework of the brain. decreased production of cerebrospinal fluid. a breakdown of the blood-brain barrier. 38. Question : The same can have different effects depending on the properties of the . Student Answer: neurotransmitter; receptor hormone; neurotransmitter receptor; neurotransmitter substrate; receptor propagation; neurotransmitter 39. Question : Presynaptic facilitation by serotonin is caused by Student Answer: increased extracellular concentration of potassium ion. increased extracellular concentration of sodium ion. temporal summation. blockage of calcium channels in the presynaptic membrane. calcium channels in the presynaptic membrane remaining open longer. 40. Question : If the dorsal root of a spinal nerve is severed, Student Answer: output to visceral organs would be blocked. sensory input would be blocked. output to skeletal muscles would be blocked. the brain would not be able to communicate with that level of the spinal cord. the spinal cord would not be able to process information at that level. 41. Question : The reflex that prevents a muscle from exerting too much tension is the reflex. Student Answer: tendon flexor reciprocal crossed extensor stretch 42. Question : The layer of the meninges in direct contact with the spinal cord is the Student Answer: subarachnoid space. choroid plexus. dura mater. arachnoid. pia mater. 43. Question : The site of intercellular communication between neurons is the Student Answer: hillock. collateral. synaptic knob. telodendria. synapse. 44. Question : Figure 12-1 The Neuron Use Figure 12-1 to answer the following questions: The structure labeled "2" is a Student Answer: perikaryon. soma. initial segment. Nissl body. dendrite. 45. Question : Summation that results from the cumulative effect of multiple synapses at multiple places on the neuron is designated Student Answer: impulse transmission. spatial summation. inhibition of the impulse. hyperpolarization. temporal summation. 46. Question : open or close in response to binding specific molecules. Student Answer: Chemically gated channels Leak channels Activated channels Voltage-gated channels both C and D 47. Question : Which of the following is a function of neuroglia? Student Answer: act as phagocytes produce cerebrospinal fluid regulate the composition of interstitial fluid provide a supportive framework all of the above 48. Question : EPSPs (excitatory postsynaptic potentials) occur when Student Answer: more potassium ions than usual leak out of a cell. more calcium ions than usual leak out of a cell. chloride ions enter a cell. hyperpolarizations occur. extra sodium ions enter a cell. 49. Question : The spinal cord consists of five regions and segments. Student Answer: 25 12 5 31 number varies widely among individuals 50. Question : After acetylcholinesterase acts, the synaptic knob Student Answer: reabsorbs the choline. reabsorbs the acetylcholine. reabsorbs the acetate. all of the above both B and C 51. Question : Muscles of the neck and shoulder are innervated by spinal nerves from the region. Student Answer: cervical coccygeal lumbar thoracic sacral 52. Question : The site in the neuron where EPSPs and IPSPs are integrated is the Student Answer: axon hillock. dendritic membrane. synaptic knob. chemical synapse. electrical synapse. 53. Question : Which of the following is not a function of the neuroglia? Student Answer: support memory phagocytosis maintenance of blood-brain barrier secretion of cerebrospinal fluid 54. Question : If the potassium permeability of a resting neuron increases above the resting permeability, what effect will this have on the transmembrane potential? Student Answer: The membrane will become depolarized. The inside of the membrane will become more positive. There will be almost no effect on transmembrane potential. The inside of the membrane will become more negative. both B and D 55. Question : Which type of synapse is most common in the nervous system? Student Answer: processing radiative chemical mechanical electrical 56. Question : Cerebrospinal fluid flows within the Student Answer: subarachnoid space. filum terminale. dura mater. pia mater. arachnoid mater. 57. Question : The white matter of the spinal cord is mainly Student Answer: nodes of Ranvier. Schwann cells. unmyelinated axons. neuroglia. myelinated axons. 58. Question : The nerve, which arises in the cervical plexus, innervates the diaphragm. Student Answer: sciatic ansa cervicalis * Times are displayed in (GMT-07:00) Mountain Time (US & Canada)
Description: South University - BIO BIO1011 AP Week 8 Quiz Grading Summary Grade Details - All Questions 1. Question : neurons are small and have no anatomical features that distinguish dendrites from axons. Student Answer: Bipolar Anaxonic Multipolar Unipolar none of the above Points Received: 1 of 1 Comments: 2. Question : How would the absolute refractory period be affected if voltage-regulated sodium channels failed to inactivate? Student Answer: It would be basically unaffected. It would be much briefer. It would last indefinitely. Points Received: 1 of 1 Comments: 3. Question : Each of the following is an example of a neuroeffector junction, except the junction between a neuron and a(n) Student Answer: endocrine gland cell. nerve cell. smooth muscle cell. exocrine gland cell. skeletal muscle cell. Points Received: 1 of 1 Comments: 4. Question : Neurons that have one axon and one dendrite, with the soma in between, are called Student Answer: tripolar. multipolar. bipolar. unipolar. anaxonic. Points Received: 1 of 1 Comments: 5. Question : The is a strand of fibrous tissue that provides longitudinal support as a component of the coccygeal ligament. Student Answer: dorsal root conus medullaris cauda equina filum terminale ventral root 6. Question : The cytoplasm that surrounds the nucleus of a neuron is called the Student Answer: perikaryon. nucleoplasm. neuroplasm. protoplasm. sarcoplasm. 7. Question : Any stimulus that opens ion channel will produce a graded potential. Student Answer: a chemically gated a mechanically gated a voltage-gated a sodium any of the above 8. Question : neurons form the afferent division of the PNS. Student Answer: Somatic sensory Visceral sensory Neural sensory Sensory none of the above 9. Question : Neurotransmitter for release is stored in synaptic Student Answer: vesicles. telodendria. knobs. neurosomes. mitochondria. 10. Question : Which of the following are a type of glial cell found in the peripheral nervous system? Student Answer: oligodendrocytes astrocytes satellite cells ependymal cells microglia Points Received: 1 of 1 Comments: 11. Question : The preganglionic fibers that connect a spinal nerve with an autonomic ganglion in the thoracic and lumbar region of the spinal cord form the Student Answer: dorsal ramus. gray rami communicantes. dermatomes. ventral ramus. white rami communicantes. 12. Question : All of the following are true of neural reflexes, except that they Student Answer: are the simplest form of behavior. help preserve homeostasis. are automatic motor responses. involve at least two neurons. cannot be modified by the brain. 13. Question : Figure 13-1 The Spinal Cord Use Figure 13-1 to answer the following questions: Identify the structure labeled "10." Student Answer: anterior white horn anterior gray commissure anterior median fissure anterior white commissure anterior white column 14. Question : Neurons that have several dendrites and a single axon are called Student Answer: tripolar. anaxonic. bipolar. unipolar. multipolar. 15. Question : The largest and most numerous neuroglia in the CNS are the Student Answer: ependymal cells. astrocytes. oligodendrocytes. microglia. none of the above 16. Question : The flexor reflex Student Answer: prevents a muscle from generating damaging tension. prevents a muscle from overstretching. is an example of a monosynaptic reflex. usually depends on cranial neurons. moves a limb away from a painful stimulus. 17. Question : The ion that triggers the release of acetylcholine into the synaptic cleft is Student Answer: calcium. sodium. potassium. magnesium. chloride. 18. Question : Which of the following is true regarding an epidural block? Student Answer: It is commonly used as a method of pain control during labor and delivery. It affects only the spinal nerves in the immediate area of the injection. It provides mainly sensory anesthesia. It can be difficult to achieve in the upper cervical and midthoracic region. all of the above 19. Question : Deteriorating changes in the distal segment of an axon as a result of a break between it and the soma is called degeneration. Student Answer: conduction peripheral Wallerian neural central 20. Question : In the process of continuous action potential propagation, Student Answer: the action potential is triggered by graded depolarization of the initial segment. at threshold, sodium channels begin to open rapidly. local currents depolarize the region just adjacent to the active zone. local currents depolarize a sensitive spot distant from the active zone. A, B, and C 21. Question : Somatic motor neurons in the spinal cord control all of the following muscles, except those that Student Answer: move the forearm and hand. move the arm. position the pectoral girdle. move the neck. move the hand and fingers. 22. Question : Sensory neurons of the PNS are Student Answer: tripolar. unipolar. bipolar. anaxonic. multipolar. 23. Question : Which of the following types of nerve fiber possesses the fastest speed of impulse propagation? Student Answer: type A type B type C type D type E 24. Question : Axons crossing from one side of the spinal cord to the other within the gray matter are found in the Student Answer: gray commissures. white commissures. lateral gray horns. anterior gray horns. posterior gray horns. 25. Question : Which of the following is the most important excitatory neurotransmitter in the brain? Student Answer: glutamate noradrenaline glycine gamma aminobutyric acid serotonin 26. Question : Which of the following comparisons between neurons and muscle tissue is false? Student Answer: Action potentials last longer in muscle fibers. Muscle fibers conduct action potentials at slow speeds. Muscle fibers conduct action potentials only by continuous propagation. Resting potentials are greater in muscle fibers. Action potentials are briefer in muscle fibers. 27. Question : Samples of CSF for diagnostic purposes are normally obtained by placing the tip of a needle in the Student Answer: epidural space. arachnoid mater. cerebral ventricles. subarachnoid space. dura mater. 28. Question : In the peripheral nervous system, Schwann cells participate in the repair of damaged nerves by Student Answer: regenerating cell bodies for the neurons. producing new axons. clearing away cellular debris. producing more satellite cells that fuse to form new axons. forming a cellular cord that directs axonal regrowth. 29. Question : The part of the peripheral nervous system that carries sensory information to the CNS is designated Student Answer: afferent. autonomic. motor. somatic. efferent. 30. Question : The efferent division of the peripheral nervous system innervates: Student Answer: heart muscle cells skeletal muscle cells glandular cells smooth muscle cells all of the above 31. Question : Figure 13-1 The Spinal Cord Use Figure 13-1 to answer the following questions: Identify the structure labeled "1." Student Answer: median commissure posterior white column anterior white column lateral white column lateral white horn 32. Question : Neurons that are rare, small, and lack features that distinguish dendrites from axons are called Student Answer: anaxonic. bipolar. tripolar. multipolar. unipolar. 33. Question : The complex, interwoven network formed by contributions from the ventral rami of neighboring spinal nerves is termed a(n) Student Answer: lateral nerve. tract. dermatome. autonomic nerve. plexus. 34. Question : Type fibers have the largest diameter axons. Student Answer: A F B S C 35. Question : In which of the following would the rate of impulse conduction be the greatest? Student Answer: a nonmyelinated fiber of 20-µm diameter a myelinated fiber of 10-µm diameter a myelinated fiber of 1-µm diameter a nonmyelinated fiber of 10-µm diameter the same in all because of the all-or-none principle 36. Question : The nervous system controls the skeletal muscles. Student Answer: afferent somatic sympathetic autonomic parasympathetic 37. Question : Extensive damage to oligodendrocytes in the CNS could result in Student Answer: inability to produce scar tissue at the site of an injury. loss of sensation and motor control. loss of the structural framework of the brain. decreased production of cerebrospinal fluid. a breakdown of the blood-brain barrier. 38. Question : The same can have different effects depending on the properties of the . Student Answer: neurotransmitter; receptor hormone; neurotransmitter receptor; neurotransmitter substrate; receptor propagation; neurotransmitter 39. Question : Presynaptic facilitation by serotonin is caused by Student Answer: increased extracellular concentration of potassium ion. increased extracellular concentration of sodium ion. temporal summation. blockage of calcium channels in the presynaptic membrane. calcium channels in the presynaptic membrane remaining open longer. 40. Question : If the dorsal root of a spinal nerve is severed, Student Answer: output to visceral organs would be blocked. sensory input would be blocked. output to skeletal muscles would be blocked. the brain would not be able to communicate with that level of the spinal cord. the spinal cord would not be able to process information at that level. 41. Question : The reflex that prevents a muscle from exerting too much tension is the reflex. Student Answer: tendon flexor reciprocal crossed extensor stretch 42. Question : The layer of the meninges in direct contact with the spinal cord is the Student Answer: subarachnoid space. choroid plexus. dura mater. arachnoid. pia mater. 43. Question : The site of intercellular communication between neurons is the Student Answer: hillock. collateral. synaptic knob. telodendria. synapse. 44. Question : Figure 12-1 The Neuron Use Figure 12-1 to answer the following questions: The structure labeled "2" is a Student Answer: perikaryon. soma. initial segment. Nissl body. dendrite. 45. Question : Summation that results from the cumulative effect of multiple synapses at multiple places on the neuron is designated Student Answer: impulse transmission. spatial summation. inhibition of the impulse. hyperpolarization. temporal summation. 46. Question : open or close in response to binding specific molecules. Student Answer: Chemically gated channels Leak channels Activated channels Voltage-gated channels both C and D 47. Question : Which of the following is a function of neuroglia? Student Answer: act as phagocytes produce cerebrospinal fluid regulate the composition of interstitial fluid provide a supportive framework all of the above 48. Question : EPSPs (excitatory postsynaptic potentials) occur when Student Answer: more potassium ions than usual leak out of a cell. more calcium ions than usual leak out of a cell. chloride ions enter a cell. hyperpolarizations occur. extra sodium ions enter a cell. 49. Question : The spinal cord consists of five regions and segments. Student Answer: 25 12 5 31 number varies widely among individuals 50. Question : After acetylcholinesterase acts, the synaptic knob Student Answer: reabsorbs the choline. reabsorbs the acetylcholine. reabsorbs the acetate. all of the above both B and C 51. Question : Muscles of the neck and shoulder are innervated by spinal nerves from the region. Student Answer: cervical coccygeal lumbar thoracic sacral 52. Question : The site in the neuron where EPSPs and IPSPs are integrated is the Student Answer: axon hillock. dendritic membrane. synaptic knob. chemical synapse. electrical synapse. 53. Question : Which of the following is not a function of the neuroglia? Student Answer: support memory phagocytosis maintenance of blood-brain barrier secretion of cerebrospinal fluid 54. Question : If the potassium permeability of a resting neuron increases above the resting permeability, what effect will this have on the transmembrane potential? Student Answer: The membrane will become depolarized. The inside of the membrane will become more positive. There will be almost no effect on transmembrane potential. The inside of the membrane will become more negative. both B and D 55. Question : Which type of synapse is most common in the nervous system? Student Answer: processing radiative chemical mechanical electrical 56. Question : Cerebrospinal fluid flows within the Student Answer: subarachnoid space. filum terminale. dura mater. pia mater. arachnoid mater. 57. Question : The white matter of the spinal cord is mainly Student Answer: nodes of Ranvier. Schwann cells. unmyelinated axons. neuroglia. myelinated axons. 58. Question : The nerve, which arises in the cervical plexus, innervates the diaphragm. Student Answer: sciatic ansa cervicalis * Times are displayed in (GMT-07:00) Mountain Time (US & Canada)