10. What would be the response ofl the muscle treated with an acetylcholinestera
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Question
10. What would be the response ofl the muscle treated with an acetylcholinesterase inhibitor a. Acetylicholine would be retained in the axon ending. b. The muscle would be nonresponsive to acetylchoine c. The muscle would contract then relax for a prolonged period of time. d. There would be continued muscle contraction in the absence of addtional nervous stimulation 11. Corpses usually exhibit rigor mortis because a. ATP hydrolysis is stimulating myosin head attachment to actin b. lack of ATP prevents myosin head detachment from actin c. calcium stores become deficient d. the cels are dead 12. Which type of contraction occurs when the muscle neither shortens nor lengthens during contraction? a, isometric b, isotonic d, eccentric motor units 13, Fine movements in the eyes and fingers are controled by a. many b, smal c large d. automatic 4. Which of the following is incorect regarding muscdle tone? a. It is maintained by tendon refex b. It is a state of sustained partial contraction. c. It keeps muscles firm, healthy and ready to respond d. It is generated in response to input from stretch receptors in muscles. 15. The axygen-binding probein found in a muscle fiber is a. cytoglobin b. hemoglobin d. immunoglobin muscle fbers. 16. A marathon runner would ikely have more a. slow glycolytic b. fast glycolytic c slow cxidative d. fast oxidative 17, Which activity would be most dependent upon creatine phosphate? a. hiking b. jogging 18. After about 30 minutes of exercise, which substance becomes the major source of fuel? a. glucose b. tatty acid c pyruvic acid d. lactic acid 19. Which of the following does not increase strength of skeletal muscle contraction? a, recruitment of more motor unts b. large size of muscle fibers c high frequency of stimulation d. increased number of new muscle fibers 20. All of the following can occur during exercise except a. oxygen levels decrease b. ATP levels decline c. inorganic phosphate levels decrease. d·calcium levels decrease 21. Which of the folowing is not directly involved in smooth muscle contraction? a. autonomic nervous system b. somatic nervous system e acetylcholine d. epinephrineExplanation / Answer
10. What would be the response of a muscle fibre treated with an acetylcholinesterase inhibitor?
(d) there would be a continued muscle fibre contraction in the absence of additional nervous system simulation.
11. Corpses usually exhibit rigor mortis because?
(b) lack of ATP prevents myosin head detachment from actin.
12.
13. Fine movements in the eyes and fingers are controlled by many motor units.
(b) small
14. Which of the following is incorrect regarding muscle tone?
(a) it is maintained by tendon reflex.
15. Oxygen binding protein found in a muscle fibre is?
( c) myoglobin
16. A marathon runner would likely have more which muscle fibers?
( d) slow oxidative
17. Which activity would be most dependent upon creatine phosphate?
(d) weight lifting
18. After about 30 minutes of exercise which substance becomes the major source of fuel?
(b) fatty acid
19. Which of the following does not increase strength of skeletal muscle contraction?
(d) increased numbersn of new muscle fibres
20. All of the following can occur during exercise except?
( b) ATP levels decline
21. Which of the following is not directly involved in smooth muscle contraction?
(a) autonomic nervous system.
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