During muscle contraction,(P) get reduced whe | vedclass

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(C) According to the sliding filament theory of muscle contraction:$(i)$ The $A$-bands (Anisotropic bands) retain their length because the length of m

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$P-I$ bands,$Q-A$ bands

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(C) According to the sliding filament theory of muscle contraction:$(i)$ The $A$-bands (Anisotropic bands) retain their length because the length of myosin filaments remains constant.$(ii)$ The $I$-bands (Isotropic bands) and the $H$-zone get reduced in length as the actin filaments slide over the myosin filaments towards the center of the sarcomere.$(iii)$ Therefore,$(P)$ refers to $I$-bands (or $H$-zones) and $(Q)$ refers to $A$-bands. Given the options,$P$ is $I$-bands and $Q$ is $A$-bands.

During muscle contraction,$(P)$ get reduced whereas $(Q)$ retain the length. Here $P$ and $Q$ are $-$

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