Natural chemicals in the brain that produce effects similar to those of morphine and other opium-derived drugs are called
A. amphetamines.
B. depressants.
C. endorphins.
D. ecstasy.
Question 2
Weight control, aggression, impulsivity, and psychological depression have all been associated with
A. serotonin pathways.
B. endorphins.
C. GABA receptors.
D. the parasympathetic branch.