Acetylcholine released into the junction between a motor neuron and a skeletal muscle binds to a sodium channel and opens it. This is an example of ________.
A) a voltage-gated sodium channel
B) a voltage-gated potassium channel
C) a ligand-gated sodium channel
D) a second-messenger-gated sodium channel
E) a chemical that inhibits action potentials

Question

Quizplus · Accepted Answer

Acetylcholine binds to a specific receptor on the postsynaptic membrane of the skeletal muscle cell, which is a ligand-gated sodium channel. This channel opens in response to the binding of acetylcholine, allowing sodium ions to flow into the muscle cell and depolarize it, ultimately leading to muscle contraction.

Acetylcholine Released into the Junction Between a Motor Neuron and a Skeletal