Which of the following is one of the steps that ends a contraction?
A) Sarcoplasmic reticulum absorbs sodium ions.
B) Acetylcholine binds to receptors on the sarcolemma.
C) Calcium ions bind to troponin.
D) Acetylcholine is broken down by acetylcholinesterase.
E) An action potential spreads across the entire surface of the muscle fiber.

Question

Quizplus · Accepted Answer

Acetylcholine is the neurotransmitter that stimulates the muscle fiber to contract. Once the contraction is complete, acetylcholine needs to be broken down by acetylcholinesterase to end the signal and allow the muscle fiber to relax.

Which of the Following Is One of the Steps That