Question

a&p flix quiz: events at the neuromuscular junction 6 parts | 0.67 of 1 point part e (5 of 6) acetylcholine binds to its receptor in the sarcolemma and triggers _. the opening of calcium - release channels the opening of ligand - gated cation channels the opening of ligand - gated anion channels the opening of voltage - gated calcium channels

Explanation:

Acetylcholine is a neurotransmitter. When it binds to its receptor on the sarcolemma, it causes the opening of ligand - gated cation channels. These channels allow cations like sodium to enter the muscle cell, which is an early step in muscle contraction. Calcium - release channels are involved later in the process related to the release of calcium from the sarcoplasmic reticulum. Ligand - gated anion channels are not relevant here as acetylcholine binding leads to cation influx. Voltage - gated calcium channels are important in other parts of the electrical signaling in neurons and muscle cells but not the immediate response to acetylcholine binding at the neuromuscular junction.

Answer:

the opening of ligand - gated cation channels