Opioids likely exert their psychoactive effects by binding to
A) endorphins.
B) opioid receptors.
C) dopamine receptors.
D) both A and B
E) both A and C

Question

Quizplus · Accepted Answer

Opioids bind to specific opioid receptors in the brain, spinal cord, and other tissues throughout the body, which are responsible for mediating their psychoactive effects. While endorphins also bind to these receptors, they are endogenous opioids produced by the body and have different effects than exogenous opioids like morphine or heroin. While opioids can have an indirect effect on dopamine release in certain brain regions, they do not bind directly to dopamine receptors.

Opioids Likely Exert Their Psychoactive Effects by Binding to