Muscles Terms

3. Made up of myofibrils and makes up the sarcomere
4. Is synonymous with muscle fiber
5. The attachment of a muscle to a moveable point on a bone over a joint/ the end of a muscle
6. The cytoplasm of a muscle cell
7. ______ twitch fibers that are good for short sprints and fatigues easily
9. ______ twitch fibers that don't fatigue easily and are good for long endurance
11. The motor neuron and all the muscle fibers it controls
14. The functional unit of skeletal muscle that shortens when a muscle contracts
15. A bundle of muscle fibers that becomes tendon at the end
16. The attachment of a muscle to a more fixed point on a bone/ the start of a muscle
17. The protein that attaches to the tropomyosin that has the binding site for calcium
19. A chain of muscle cells
20. when the myosin head attaches to the actin
21. thin filament
23. A neuron that specializes in movement commands
24. thin protein attached to actin that prevents the attachment of myosin

1. Caused by microtears in muscle fiber, also know as delayed onset muscle soreness
2. The plasma membrane of a muscle cell
6. The endoplasmic reticulum of a muscle cell
8. Help to spread the electrical signal from motor neuron
9. Makes prime mover more effective by helping it
10. When the body stiffens after death because of chemical changes
12. Muscles cannot push a bone they can only ____ it
13. Thick filament
18. The muscle in a group that does most of the work
21. Opposes the prime mover during movement
22. involuntary, painful contraction of a muscle caused by fatigue/low electrolytes