Which of these events must occur first to trigger the skeletal muscle to generate an action potential and contract?
A) sodium ions rush into the cell
B) acetylcholine (ACh) causes temporary permeability to sodium
C) diffusion of potassium ions out of the cell
D) operation of the sodium-potassium pump
E) acetylcholinesterase (AchE) breaks down acetylcholine (ACh)

Question

Quizplus · Accepted Answer

Acetylcholine (ACh) must bind to receptors on the muscle cell to cause temporary permeability to sodium ions, triggering the action potential and contraction.

Which of These Events Must Occur First to Trigger the Skeletal