Acetylcholine
A)is always an excitatory neurotransmitter.
B)can bind to adrenergic receptors.
C)is an inhibitory neurotransmitter released by motor neurons.
D)can bind to nicotinic receptors.

Question

Quizplus · Accepted Answer

Acetylcholine can bind to nicotinic receptors, which are ionotropic receptors that directly cause an influx of cations and depolarization of the postsynaptic membrane. It can also bind to muscarinic receptors, which are metabotropic receptors that indirectly activate G-protein coupled intracellular signaling pathways that can lead to either excitation or inhibition of the postsynaptic neuron. It is not always an excitatory neurotransmitter, and it cannot bind to adrenergic receptors.