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As the sarcomere contracts which band becomes smaller? Which band remains the same?

As the sarcomere contracts which band becomes smaller? Which band remains the same?
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As the sarcomere contracts which band becomes smaller? Which band remains the same?

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User Alec Rooney
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1 Answer

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Anatomy During Contraction

-Sarcomere, itself, is shorter
-H-zone is shorter (part of A-band that doesn't have actin filaments in it)
-I-band gets shorter (part of sarcomere lacking myosin)
-A-band stays the same size (zone that contains myosin)

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User Jed Anderson
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