Q.

During contraction of skeletal muscle, which of the following does not occur?

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a

The length of isotropic band shortens.

b

The length of anisotropic band shortens.

c

The distance between two successive Z-line decreases.

d

The length of Henson-zone shortens.

answer is B.

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Detailed Solution

During shortening of skeletal muscle, i.e., contraction, sarcomere (Z line to Z- line) shortens. I-band get reduced where as the A-band retains the length. H-zone also get reduced in length.

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