PHYSIOLOGY
SLIDING FILAMENT MODEL
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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A sarcomere is best described as
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The attachment point of a myosin head and an actin filament
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A sarcastic muscle
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The cell membrane of a muscle fiber
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The part of the myofibril that contracts or shortens
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Explanation:
Detailed explanation-1: -During muscle contraction, which band(s) of the sarcomere shorten(s)? Explanation: Muscle contraction results in both the H-band and I-bands shortening, but the A-band remains the same length (A band is Always the same).
Detailed explanation-2: -The contraction of a striated muscle fiber occurs as the sarcomeres, linearly arranged within myofibrils, shorten as myosin heads pull on the actin filaments.
There is 1 question to complete.