Which of these activities is involved in the process of muscle relaxation?

Question

Quizplus · Accepted Answer

Ca²⁺, also known as calcium ion, is actively taken up by the sarcoplasmic reticulum when there is no longer a local action potential, leading to muscle relaxation. Acetylcholinesterase promotes the breakdown of acetylcholine, which is involved in muscle contraction. Cross bridges from the thick filaments binding to the thin filaments and bending is involved in muscle contraction, not relaxation. ATP becoming unavailable would lead to muscle fatigue, not relaxation.

Which of These Activities Is Involved in the Process of Muscle