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UNIT 12
Assignment: 3
TASK 1
ORGANIZATION OF NERVOUS SYSTEM
The sensory system is the communicating and controlling system of the body as it has three fundamental functions:
 Utilizing tactile receptors that’s used to screen changes in and out of the body (sensory neurons)
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 Integration, which processes and translates tactile information
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Sensory division deliver impulses to the CNS from different parts of the
body whereas, the motor division carries impulses from the CNS to glands and muscles
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The autonomic nervous system is part of the PNS and has two divisions sympathetic and parasympathetic, which
controls heart rate, digestion, respiration rate, salvation and perspiration
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Parasympathetic
neurons begin in the cervical and sacral regions of the spinal cord and function in a way that would not require an
immediate response
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TASK 2
FUNCTIONS OF NERVOUS SYSTEM
The nervous system has four components:
 Brain
 Spinal cord
 Nerves
 Sensory receptors
These are responsible for mental activities, stimulating muscle movements and sensory perceptions
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As the dendrites
act as the input and axon as the output
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Sensory or afferent neurons action potentials towards CNS whereas, Motor or efferent action potentials away from the
CNS
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Cells produce electrical signals called action potentials
which is used to transmit information to different parts of the body where the synapse junction between two cells
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UNIT 12
Assignment: 3
REFERENCES
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Bbc
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uk, "BBC Bitesize - GCSE Biology - The Nervous System - Revision 1"
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p
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Web
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2016
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"What Is the Nervous System?"
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net
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p
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Web
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2016
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com, "Nervous System Anatomy, Diagram & Function"
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p
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Web
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2016
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ucfsd
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N
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, 2016
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5 Feb
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System, Nervous
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Inner Body
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p
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Web
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2016
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N
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, 2016
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5 Feb
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