When a muscle contracts, exactly what structure gets shorter? A. the fascicles of a muscle B. the myosin molecules of a myofi lament C. the actin molecules of a myofi lament D. the sarcomeres of a myofi bri

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Muskan Anand

2 years ago

Option D. Sarcomere getting shorter when muscles contracts however it regain thein length when muscles relax.

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