单选题 Most antipsychotic medications exert which of the following effects on the central nervous system (CNS)

A、 Stimulate the CNS by blocking postsynaptic dopamine, norepinephrine, and serotonin receptors.
B、 Sedate the CNS by stimulating serotonin at the synaptic cleft.
C、 Depress the CNS by blocking the postsynaptic transmission of dopamine, serotonin, and norepinephrine.
D、 Depress the CNS by stimulating the release of acetylcholine.

【正确答案】 C

【答案解析】The exact mechanism of antipsychotic medication action is unknown, but it appears to depress the CNS by blocking the transmission of three neurotransmitters: dopamine, serotonin, and norepinephrine. They don't sedate the CNS by stimulating serotonin, and they don't stimulate neurotransmitter action or acetylcholine release.