Research on neurotransmitters has shown that:
A)they exist only in the brain.
B)harmful effects can occur at too high or too low levels.
C)there are five known and ten suspected neurotransmitters.
D)acetylcholine functions as a major inhibitory neurotransmitter.

Question

Quizplus · Accepted Answer

Neurotransmitters have specific optimal levels in the brain, and too high or too low levels can lead to harmful effects, such as neurological disorders or psychiatric diseases.

Research on Neurotransmitters Has Shown That