Muscle Physiology

4. According to Hennenman's size principle, __________ motor units are recruited first
6. Cytoplasm of muscle cell that is under the sarcolemma
8. skeletal muscle fivers are generally classified according to the primary dependence on different metabolic pathways for production of _____.
9. Slow twitch muscle fibers are fatigue resistant, and good for __________ exercise.
13. Type I muscle fivers, or ____ fibers, are slow oxidative fibers
14. A T-tubule and two terminal cisternae
19. ACH is decomposed by ____________.
21. Muscular action performed at a constant angular velocity without controlled resistance

1. Increase in fiber number
2. Golgi tendon organs respond to ________
3. Muscle cells are _________ in appearance
5. Primary protein in thin filament that forms the backbone
7. The two shapes of actin are _________ and fibrous
9. A myosin molecule is composed of 6 _____________ chains, 2 heavy and 4 light
10. ________ contractions cause the most damage to muscles
11. ______ muscle contains two binding sites for Ca++
12. Nomenclature of muscle types is done through histochemical ___________
15. Type IIb muscle fibers, or ______ fibers, are fast glycolytic fibers
16. Excitation contraction coupling is the process by which myofibrils translate _______ impulses into muscle contraction.
17. At rest, ________________ molecules lie on top of the actin active sites, inhibiting interaction between actin and myosin.
18. The capacity of skeletal muscle for adaptive change due to training, nutrition, or endocrine milieu
20. ATP-utilizing motor protein that generates movement by interaction with actin filaments.