By definition,any exogenous drug that binds to an opiate receptor provides relief from pain.Therefore,any exogenous drug may be blocked by a(n)_____ antagonist.
A)narcotic
B)opiate
C)opioid
D)morphine

Question

Quizplus · Accepted Answer

The term "opioid" refers to any exogenous drug that binds to an opiate receptor, providing pain relief. An opioid antagonist would therefore block the effects of this type of drug. "Narcotic" and "morphine" both specifically refer to a class of opioid drugs, whereas "opiate" refers to any drug derived from the opium plant. Therefore, "opioid" is the best choice as it encompasses all types of drugs that bind to opiate receptors.

By Definition,any Exogenous Drug That Binds to an Opiate Receptor