3 years ago

What happens to actin and myosin when muscles relax?

1 answer:

4 0

ATP-driven pumps will move Ca ++ out of the sarcoplasm back into the SR. This results in the “reshielding” of the actin-binding sites on the thin filaments. Without the ability to form cross-bridges between the thin and thick filaments, the musclefiber loses its tension and relaxes.

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