Upon Release into the Synapse, Neuropeptides Differ from Small-Molecule Transmitters

question 127

Multiple Choice

 Upon release into the synapse, neuropeptides differ from small-molecule transmitters as they

• A) cannot be deactivated by enzymes, whereas small-molecule transmitters diffuse away or are deactivated by reuptake.
• B) are deactivated by reuptake, whereas small-molecule transmitters diffuse away or are deactivated by enzymes.
• C) can diffuse away from synapses, whereas small-molecule transmitters are deactivated by reuptake.
• D) and small-molecule transmitters can be deactivated by diffusion, enzymes, or reuptake.

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