Muscular System

1. muscle that provides a particular body movement
2. contraction of the muscle stays the same, muscle length changes
5. branched, striated, intercalated discs, involuntary (2 words)
6. thick protein filament (had heads)
7. parallel, striated, voluntary (2 words)
9. energy source
11. contraction of the muscle, no movement of the muscle
12. not muscle contraction occurring
13. contractile response of a single muscle fiber
15. function connection between a muscle and axon terminal
17. muscles that assist the action of the prime mover
18. the loss of ability for a muscle to contract
19. neurotransmitter that stimulates muscle contractions
20. a structural unit of a myofibril in striated muscle
22. the other end of the muscle that connects to the movable part on the other side of the joint

1. breaks down acetylcholine to stop a contraction
3. he one end of skeletal muscle that usually fastened to a relatively immovable or fixed part of a moveable joint
4. stores oxygen and gives muscles their reddish-brown color
8. muscle that opposes the prime mover
10. spindle shaped, involuntary (2 words)
14. pigment responsible for the red color in blood, carries oxygen
16. layer of connective tissue that closely surrounds a skeletal muscle
21. thin protein filament (twisted strands)