NEET BiologyClass 11Mechanism of muscle contractionMediumStatement based
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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