The effects of most psychoactive drugs can be explained by their actions on _____________-
a. glands.
b. muscles.
c. the spinal cord.
d. neurotransmitters.
Answer: D
The effects of most psychoactive drugs can be explained by their actions on _____________-
a. glands.
b. muscles.
c. the spinal cord.
d. neurotransmitters.
Answer: D