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Title: Notes on muscle physiology
Description: Detailed notes on the anatomy of muscles. This notes are very comprehensive and include everything mentioned from class. I received an A using these notes.
Description: Detailed notes on the anatomy of muscles. This notes are very comprehensive and include everything mentioned from class. I received an A using these notes.
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Muscle physiology Notes:
Objectives:
1
...
Understand gross muscle anatomy
3
...
Elongated muscle fibers (exception-cardiac)
2
...
2 important myofilaments: Actin or myosin microfilaments, proteins
...
Muscle terminology
a
...
Voluntary muscle
a
...
2
...
Longest muscle fibers in the body, greatly elongated
4
...
Striated = parallel stripes (under the microscope)
5
...
Highly adaptable
a
...
Only found in the heart
2
...
Involuntary control
a
...
Contracts at a steady rate
a
...
Lines hollow visceral organs
a
...
Moves fluids through “tubes”
3
...
Has a very random appearance
4
...
Happens unconsciously, no control
5
...
Excitability: muscles respond to stimulus
a
...
Contractibility: shortens by force to accomplish something
a
...
Only cell type in the body that can forcibly shorten it’s length
3
...
Elasticity: fibers recoil to normal length after stretching
a
...
Epimysium:
a
...
Perimysium and fascicles
a
...
Fascicle: grouped muscle fibers (bundles)
3
...
Fiber within a fascicle wrapped by a fine sheath
Slide 9: image of muscle connective tissue layers
Perimysium surrounds individual bundles of muscle fibers called fascicles
Surrounding each fiber within a fascicle is the endomysium
Slide 10: muscle attachments:
Insertion point: attached to movable bone
Muscle origin: attached to immovable bone
o Meant for anchoring and leverage
Contraction: muscle moves insertion point toward the origin
Slide 11: image of muscle attachments:
Slide 12: muscle attachments: two types:
1
...
Epimysium of muscle fused to periosteum of bone
b
...
Indirect: more common attachment
a
...
Anchors to connective tissue of bone or cartilage
Slide 13: image of tendons
Periosteum: outer layer of bone
Slide 14: microanatomy of skeletal muscle: muscle fiber
Muscle fiber
o Long cylindrical cell
o Multiple nuclei
Under sarcolemma = plasma membrane of muscle cell
Multi nucleated : during embryonic development, multiple cells come together
to form one muscle fiber
Title: Notes on muscle physiology
Description: Detailed notes on the anatomy of muscles. This notes are very comprehensive and include everything mentioned from class. I received an A using these notes.
Description: Detailed notes on the anatomy of muscles. This notes are very comprehensive and include everything mentioned from class. I received an A using these notes.