How do acetylcholine and norepinephrine differ?

A. Acetylcholine functions on the autonomic nervous system, while norepinephrine functions only on the sympathetic nervous system.
B. Acetylcholine is excitatory, while norepinephrine is inhibitory.
C. Acetylcholine affects arousal, whereas norepinephrine affects motor movements.
D. Norepinephrine functions on the autonomic nervous system, while acetylcholine functions only on the sympathetic nervous system.


Answer: A

Psychology

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