The first event to occur in muscle relaxation is that:

Question

Quizplus · Accepted Answer

During muscle relaxation, the sarcoplasmic reticulum actively pumps calcium back into its sacs, which reduces the concentration of calcium ions in the cytoplasm. This decrease in calcium concentration causes tropomyosin to return to its original position and myosin cross-bridges to be prevented from binding to actin, leading to relaxation of the muscle. Acetylcholine is involved in muscle contraction, not relaxation.

The First Event to Occur in Muscle Relaxation Is That