16. A sarcomere is the distance between two Z lines, A bands, I bands, H zones.
17. The filaments that contain myosin only are located in the A) Z lines, B bands, I bands, H zones.
18. Which area contains only actin filaments? A) Z lines, C bands, B bands, D) H zones.
19. Thick filaments are made of A) actin, C A bands, B) myosin, D) Z bands.
20. The neurotransmitter released at motor end plates by nerve endings is A) acetylcholine, C cholinesterase, B creatine phosphate, D calcium ions.
21. During skeletal muscle actions, if the primary mover contracts, the antagonist A) contracts also, C) contracts, then relaxes, B) becomes the origin, D) relaxes.
22. What substance destroys acetylcholine? A) creatine phosphate, B) lactic acid, C cholinesterase, D) calcium ions.
23. Theoretically, if a muscle were stretched to the point where thick and thin filaments no longer overlapped A) maximum force production will result since the muscle has a maximum range of travel, B) no muscle tension would be generated sites on actin, C) cross bridge attachment would be optimum because of all the tree binding contract, D) ATP consumption would increase since the sarcomere is trying to.
24. Bundles of muscle fibers are surrounded by the - A) endomysium, B) perimysium, C) epimysium, D) ectomysium olhesto.