While a chemical that mimics a neurotransmitter and can bind to receptor sites and cause postsynaptic potentials is a(n) ____, a chemical that can bind to receptor sites and block the action of neurotransmitters is a(n) ____.
A) artificial neurotransmitter; anti-neurotransmitter
B) antagonist; agonist
C) agonist; antagonist
D) endogenous neurotransmitter; ectodogenous neurotransmitter

Question

Quizplus · Accepted Answer

An agonist is a chemical that mimics a neurotransmitter and can bind to receptor sites and cause postsynaptic potentials. On the other hand, an antagonist is a chemical that can bind to receptor sites and block the action of neurotransmitters. Therefore, the best choice is C, which correctly pairs agonist and antagonist. Option A is incorrect because there is no such thing as an anti-neurotransmitter. Option B is incorrect because the terms are switched around. Option D is incorrect because there is no such thing as an ectodogenous neurotransmitter.

While a Chemical That Mimics a Neurotransmitter and Can Bind