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Biology

NEET BiologyClass 11Mechanism of muscle contractionMediumStatement based

Question 4 of 10

Examine the statements about muscle contraction.

  • Statement I: During contraction of a sarcomere, the I band and the H zone become narrower, while the length of the A band remains the same.
  • Statement II: Ca²⁺ ions released from the sarcoplasmic reticulum bind to tropomyosin and thereby expose the active sites on actin.

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