Physiology

All of the following statements regarding activity at the neuromuscular junction are true except:

Action potentials on the alpha motor neuron release acetylcholine (Ach) from the axon terminal

Ach stimulates nicotinic cholinergic receptors on the muscle endplate

Cholinergic receptors on the muscle endplate are cation channels

Alpha motor neurons excite, and Renshaw cells inhibit, the muscle endplate