Which of the following statements about the effects of cocaine in laboratory animals are true?
a. Cocaine is more reinforcing in humans than in rats.
b. Rats do not self-inject cocaine.
c. Rats that self-injected cocaine were three times more likely to die from an overdose than rats who self-injected heroin.
d. Rats that learn to self-administer cocaine develop psychosis.
e. Cocaine decreases dopamine with the nucleus accumbens.
Answer: c. Rats that self-injected cocaine were three times more likely to die from an overdose than rats who self-injected heroin.
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