When causing depolarization of the muscle membranes, what neurotransmitter interacts with the nicotinic cholinergic receptors leading to the release of calcium ions?
A) Acetylcholine
B) Serotonin
C) D-gluconamidoethyl methacrylate (GAMA)
D) Epinephrine
A
Feedback:
At the acetylcholine receptor site on the effector's side of the synapse, the acetylcholine interacts with the nicotinic cholinergic receptors causing the depolarization. Serotonin, GAMA, and epinephrine are not part of muscle contraction and relaxation.
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