A patient has fear as well as increased heart rate and blood pressure. The nurse suspects increased activity of which neurotransmitter?
a. Gamma-aminobutyric acid (GABA)
b. Norepinephrine
c. Acetylcholine
d. Histamine
ANS: B
Norepinephrine is the neurotransmitter associated with sympathetic nervous system stimulation, preparing the individual for "fight or flight." GABA is a mediator of anxiety level. A high concentration of histamine is associated with an inflammatory response. A high concentration of acetylcholine is associated with parasympathetic nervous system stimulation.
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