Which of the Following Neurons is Classified as an Adrenergic

Question

Which of the following neurons is classified as an adrenergic fiber?
A) parasympathetic preganglionic neuron
B) sympathetic preganglionic neuron
C) sympathetic postganglionic neuron
D) both A and B

Accepted Answer

Adrenergic fibers release the neurotransmitter norepinephrine, which is the primary neurotransmitter released by sympathetic postganglionic neurons. Parasympathetic preganglionic neurons release acetylcholine, while sympathetic preganglionic neurons release both acetylcholine and norepinephrine. Therefore, the only option that fits the description of an adrenergic fiber is the sympathetic postganglionic neuron, which releases norepinephrine.