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NEET AIPMT SOLVED PAPER 2001

  • question_answer
                    Which statement is correct for muscle contraction?                                                                        

    A)                 Length of H-zone is decreased  

    B)                 Length of A-band remains constant

    C)                 Length of l-band gets increased

    D)                 Length of two Z-line get increased

    Correct Answer: B

    Solution :

                    When \[C{{a}^{+}}\] ions combine with troponin contraction of muscle initiates.                 During contraction, die Z lines come closer together and the sarcomere becomes shorter. The length of A band remains constant. I bands shortens and H zone narrows.


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