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Which statement is correct for muscle contraction?
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- Length of H-line decreases
- Length of A-band remains constant
- Length of I-band increases
- Length of two Z-lines increase
- None of these
Correct Option: E
(a,b) When Ca+ ions combine with troponin contraction of muscles initiates. During contraction the Z lines come closer together and the sarcomere becomes shorter. The length of A band remains constant. I bands shortens and H-band narrows.
