MUSCLE
SKELETAL MUSCLE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which of the following decreases during muscle contraction?
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M line
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A band
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H zone
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Z line
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Explanation:
Detailed explanation-1: -When muscle contracts, The Z discs come close together. The width of the I bands decreases. The width of the H zones decreases.
Detailed explanation-2: -The H zone-the central region of the A zone-contains only thick filaments and is shortened during contraction. The I band contains only thin filaments and also shortens.
Detailed explanation-3: -As the ends of the actin filaments get closer to the M band, the I band appears denser and the H zone becomes narrower.
Detailed explanation-4: -A sarcomere is defined as the distance between two consecutive Z discs or Z lines; when a muscle contracts, the distance between the Z discs is reduced.
There is 1 question to complete.