Question

When an action potential reaches a neuromuscular junction, which of the following will happen first?

Answer 1

Acetylcholine enters into the synapse to bond with receptor proteins.

Step-by-step explanation:

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Answer 2

When an action potential reaches a neuromuscular junction, it causes acetylcholine to be released into this synapse. The acetylcholine binds to the nicotinic receptors concentrated on the motor end plate, a specialized area of the muscle fibre's post-synaptic membrane.