What is the position of M-line during muscle contraction?

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Solution

M-line is the attachment site for the thick filaments. It is in the center of the A band. It is present in the center of the sarcomere. During muscle contraction, the thin filaments slide past the thick filaments or M-line. This shortens the sarcomere. During this, the A band which is composed of myosin remains the same. The M line remains in the center of the sarcomere.

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