While a Chemical That Mimics a Neurotransmitter and Can Bind

Multiple Choice

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