In order for excitation-contraction coupling to occur, the production of an action potential must occur within the ________ of a muscle fiber.
A) contraction
B) junction
C) sarcolemma

Question

Quizplus · Accepted Answer

The sarcolemma is the cell membrane of a muscle cell (fiber) and is essential for initiating the action potential that leads to muscle contraction. This action potential is necessary for excitation-contraction coupling, the process by which an electrical stimulus triggers muscle contraction.

In Order for Excitation-Contraction Coupling to Occur, the Production of an Action