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Anatomy mu

Anatomy muscles study stack

TermDefinition
1. isotonic contractions same tone muscles
2. isometric contractions same length muscles
3. muscle fatigue unable to contract
4. oxygen debt lack of oxygen
5. muscle tone continuous contractions
6. flexion hinge joints
7. extension increases distance between two bones
8. rotation ball-and-socket joints
9. abduction away from the midline
10. adduction toward the midline
11. circumduction combination of flexion, extension, abduction, and adduction
12. aerobic more resistance to fatigue
13. anerobic less resistance to fatigue. stronger
14. endomysium tissue sheath around a muscle fiber
15. perimysium sheath outside endomysium
16. fascicle bundle of muscle fibers
17. striated muscle muscles with stripes on them
18. smooth muscle muscles that are smooth
19. cardiac muscle only found in heart
20. tendons attach muscle too bone
21. what is contractility? the ability of skeletal muscle to shorten with force
22. what is excitability? the capacity of skeletal muscle to respond to a stimulous
23. what is the epimysium? surrounds the skeletal muscle
24. what is the perimysium ? a coarse fibrous membrane
25.what is a striated muscle? skeletal muscle that is striped
26.what are muscle fibers? elongated muscle cells
27.what is a smooth muscle ? has no striations and is involuntary, which means that you cannot continuously control it.
28.what is the A band ? extends the length of the myosin. it is the darker central region in each sarcomere.
29.what is the H zone? the light area in the center of each sarcomere witch consists of only myosin.
30.what is the resting membrane potential? the charge difference across the membrane
31.what is action potential? when a muscle cell is stimulated the membrane characteristics reverse the charge back.
32.what are motor neurons? are nerve cells the carry action potentials to skeletal muscle fibers
33.what is a synapse? near the center of the cell
34.what is a presynaptic terminal? the enlarged nerve terminal
35.what is the synaptic cleft? the space between the presynaptic terminal and the muscle cell
36.what is a acetylcholine? a neurotransmitter the diffuses across the synaptic cleft and binds to thepostsynaptic terminal
37.what is a muscle twitch? a contraction of an entire muscle in response to a stimulus that causes the action potential in one or more muscle fibers
38.what is a lag phase? the time between application of a stimulus to a motor neuron and the beginning of the contraction
what is the contraction phase? the time of the contraction
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Created by: psyblader
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