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