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10-03-2021
Biology

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what happens to the width of a light band after a muscle contracts

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12-03-2021

Answer:

For a muscle cell to contract, the sarcomere must shorten. However, thick and thin filaments—the components of sarcomeres—do not shorten. ... The A band stays the same width and, at full contraction, the thin filaments overlap. When a sarcomere shortens, some regions shorten whereas others stay the same length.

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