Which of the following is an explanation of why drug abusers prefer heroin over morphine?
a. Heroin is cheaper than morphine.
b. Morphine enters the brain faster than does morphine.
c. Heroin is less lipid-soluble than is morphine.
d. Heroin exerts effects on the brain faster than does morphine.
e. Morphine is cheaper than heroin.
Answer: d. Heroin exerts effects on brain faster than does morphine.
Psychology
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