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Which statement is correct for muscle contraction? [2001]
  • a)
    Length of H-line decreases
  • b)
    Length of A-band remains constant
  • c)
    Length of I-band increases
  • d)
    Length of two Z-lines increase
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
Which statement is correct for muscle contraction? [2001]a)Length of H...
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.
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Which statement is correct for muscle contraction? [2001]a)Length of H...
The muscle contraction cycle is triggered by calcium ions binding to the protein complex troponin, exposing the active-binding sites on the actin. As soon as the actin-binding sites are uncovered, the high-energy myosin head bridges the gap, forming a cross-bridge.
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Community Answer
Which statement is correct for muscle contraction? [2001]a)Length of H...
Length of A-band remains constant
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