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 open specific ion channels in cell on which they act

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