A drug that blocks a presynaptic autoreceptor
A) reduces the release of the neurotransmitter from the axon terminal.
B) alters the uptake of the neurotransmitter into the axon terminal.
C) blocks the opening of ion channels in the postsynaptic membrane.
D) increases the release of the neurotransmitter from the axon terminal.
E) would be expected to act as an antagonist for this synapse.
Answer: D
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