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does the A band length change when a muscle contracts?
Published April 17, 2011
Question by ~kimmy~: does the A band length change when a muscle contracts?
the A band inside the sarcomere.
thank you!
Best answer:
Answer by katie krajnak
Upon muscle contraction, the A-bands do not change their length (1.85 micrometer in mammalian skeletal muscle), whereas the I-bands and the H-zone shorten. This causes the Z lines to come closer together.
Add your own answer in the comments!