Some of the morphine-like substances that occur naturally in the brain are
A) endorphins.
B) autoreceptors.
C) exogenous.
D) benzodiazepines.
E) false transmitters.

Question

Quizplus · Accepted Answer

Endorphins are naturally occurring morphine-like substances in the brain that can produce feelings of pain relief and euphoria.

Answer: B, C, D, E are incorrect 
 Autoreceptors, exogenous substances, benzodiazepines, and false transmitters are not naturally occurring morphine-like substances in the brain. Autoreceptors are receptors that regulate neurotransmitter release, exogenous substances are those that come from outside the body, benzodiazepines are a type of anti-anxiety medication, and false transmitters are substances that resemble neurotransmitters but do not have the same effects.

Some of the Morphine-Like Substances That Occur Naturally in the Brain