Multiple Choice
The brain affects the immune system through autonomic nerve fibers that innervate immune system organs such as the spleen and the thymus gland. These fibers are usually _______ sympathetic postganglionic axons.
A) serotonergic
B) dopaminergic
C) cholinergic
D) noradrenergic
Correct Answer:

Verified
Correct Answer:
Verified
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