Mastering A&P with Pearson eText -- Standalone Access Card -- for Human Anatomy (9th Edition)
9th Edition
ISBN: 9780134419473
Author: Martini
Publisher: PEARSON
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Chapter 9, Problem 4RC
Summary Introduction
Introduction:
Muscle contraction refers to the acceleration of tension-producing points present in the muscle fibers. The contraction of muscle fiber exerts a tension that leads to shortening of the length of muscle fiber. This process requires energy in the form of ATP.
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Chapter 9 Solutions
Mastering A&P with Pearson eText -- Standalone Access Card -- for Human Anatomy (9th Edition)
Ch. 9 - 1. Active sites on actin become available for...Ch. 9 - Prob. 2RFTCh. 9 - Prob. 3RFTCh. 9 - 4. Another name for a muscle that is a prime mover...Ch. 9 - Prob. 5RFTCh. 9 - Prob. 6RFTCh. 9 - 7. The theory that explains muscle contraction is...Ch. 9 - Prob. 8RFTCh. 9 - Label the illustrations to the right as...Ch. 9 - Prob. 1RC
Ch. 9 - 2. The ability to recover from injuries in older...Ch. 9 - Prob. 3RCCh. 9 - Prob. 4RCCh. 9 - Prob. 5RCCh. 9 - A motor unit from a skeletal muscle contains 1500...Ch. 9 - 7. What is the role of the zone of overlap in...Ch. 9 - Several anatomy students take up weight lifting...Ch. 9 - Prob. 2CT
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- Why do you think a person is able to perform anaerobic exercise (such as lifting and holding a heavy weight) only briefly but can sustain aerobic exercise (such as walking or swimming) for long periods? (Hint: Muscles have limited energy stores.)arrow_forwardWhich of the following statements about skeletal muscle is CORRECT? Select one: a. An increase in Na+ concentration in the cytosol starts muscle filament sliding. b. The muscle is non-striated and involuntary. c. The muscle is involved in shivering thermogenesis. d. The muscle contracts in response to parasympathetic stimulation. e. The muscle contracts in response to hormones.arrow_forwardHow do muscles contribute to body temperature before,during, and after exercise?arrow_forward
- Can you explain how to do it? and show the steps?arrow_forwardA difference between marathon runners and sprinters is ______. sprinters perform better in activities that require slow, steady muscle activity sprinters have a high proportion of muscle fibers that require oxygen to make ATP marathon runners have more fast-twitch muscle fibers in their leg muscles marathon runners have more slow-twitch fibers in their leg musclesarrow_forwardWhen you rub your cold hands together, the friction be-tween them results in heat that warms your hands. Whydoesn’t warming friction result during movements of theheart, lungs, and digestive organs?arrow_forward
- One of the major questions of regeneration is whether the cells keep a “memory” of what they had been. In other words, do new muscles arise from old muscle cells that dedifferentiated, or can any cell of the blastema become a muscle cell?arrow_forwardIf a person exercises to achieve bigger muscles, what effort must be exerted and what actually increases, the size or the number of muscle cells?arrow_forwardWhich is more important, to cool an overheated athlete, or to heat a cold one? Why?arrow_forward
- After a vigorous exercise, you may experience cramps in your leg muscles. Why does this happen?arrow_forwardHeat exchange with the environment depends on the surface area-to-volume ratio of the body. Assuming that the body shape of an animal is at least somewhat spherical, a considerable decrease in body size would _______ the surface area-to-volume ratio, and the ability to exchange heat with the environment would _______. A. increase; increase B. increase; stay about the same C. increase; decrease D. decrease; increase E. decrease; stay about the samearrow_forwardIf a muscle cell’s sarcoplasmic reticulum had little to no Ca2+, could the muscle cell still produce an electrical impulse, and would the muscle cell still contract? Explain.arrow_forward
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