Many psychoactive drugs including alcohol, cocaine, and amphetamines are addictive because they affect the neurotransmitter ________ , which is part of the brain's natural reward system.

Many psychoactive drugs including alcohol, cocaine, and amphetamines are addictive because they affect the neurotransmitter ________ , which is part of the brain's natural reward system.




a. glutamate
b. GABA
c. serotonin
d. dopamine


Answer: D. Dopamine


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