During muscular contraction,which of the foll | vedclass

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(D) According to the sliding filament theory,during muscular contraction,the thin filaments slide over the thick filaments. As a result,the $I$-band a

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$H$-zone will decrease in length

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(D) According to the sliding filament theory,during muscular contraction,the thin filaments slide over the thick filaments. As a result,the $I$-band and the $H$-zone decrease in length. However,the $A$-band remains constant in length. Since both $A$ and $D$ are technically correct in many contexts,the $H$-zone is the most specific region that disappears or shortens significantly during contraction. Therefore,the $H$-zone decreases in length.

During muscular contraction,which of the following occurs?

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