Indicate Which Characteristic Applies to Classical Neurotransmitters and Neuropeptides Using

Multiple Choice

Indicate which characteristic applies to classical neurotransmitters and neuropeptides using the following answer code:
-usually function as neuromodulators

A) applies to classical neurotransmitters
B) applies to neuropeptides
C) applies to both classical neurotransmitters and neuropeptides
D) applies to neither classical neurotransmitters nor neuropeptides