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Anatomy mu
Anatomy muscles study stack
| Term | Definition |
|---|---|
| 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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