PHYSIOLOGY
MUSCLE CONTRACTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Contraction occurs when sarcomeres ____
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Lengthen
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Shorten
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Stay the same size
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Enlarge
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Explanation:
Detailed explanation-1: -Muscle contraction occurs when sarcomeres shorten, as thick and thin filaments slide past each other, which is called the sliding filament model of muscle contraction. ATP provides the energy for cross-bridge formation and filament sliding.
Detailed explanation-2: -During contraction, the ends of the sarcomeres are pulled closer together, thus shortening the length of the muscle fiber.
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