An _____ is a drug that mimics or increases a neurotransmitter's effects, whereas an _____ is a drug that blocks a neurotransmitter's effects.
A)agonist/antagonist
B)antagonist/agonist
C)oxytocin/endorphin
D)endorphin/oxytocin

Question

Quizplus · Accepted Answer

An agonist is a drug that mimics or increases the effects of a neurotransmitter, whereas an antagonist is a drug that blocks the effects of a neurotransmitter. Therefore, choice A is the correct answer. Choices C and D refer to specific neurotransmitters, but do not describe their agonist or antagonist effects.

An _____ Is a Drug That Mimics or Increases a Neurotransmitter's