Question

Many drugs produce their effects by facilitating or interfering with neurotransmitters at synapses.

Which of the following drugs would most likely increase the effect of serotonin?

a. a drug that binds to directly coupled serotonin receptors but does not change membrane permeability

b. a drug that prevents the activity of an enzyme that breaks down serotonin molecules in the synaptic cleft

c. a drug that blocks the effect of Ca2+ ions

d. a drug that blocks the effect of a conditional neurotransmitter that normally facilitates the effect of serotonin

Answer

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