Question

the response of the sarcolemma to stimulation by a nerve impulse is to open ______. calcium channels, allowing calcium to enter the cell acetylcholine channels, allowing ach to enter the cell sodium channels, allowing sodium to enter the cell need help? review these concept resources. rate your confidence to submit your answer. high medium low reading © 2025 mcgraw hill. all rights reserved. privacy center terms of use

Explanation:

When the sarcolemma is stimulated by a nerve impulse, voltage - gated sodium channels open first. This allows sodium ions to rapidly enter the cell, depolarizing the membrane and initiating an action potential. Acetylcholine is a neurotransmitter that binds to receptors on the sarcolemma, not enter the cell through channels. Calcium channels are involved in later steps of muscle contraction after the initial depolarization.

Answer:

sodium channels, allowing sodium to enter the cell