Questions and Answers
Which of the following is a characteristic of tolerance?
Tolerance is a decrease in the effectiveness of a drug that is administered repeatedly.
What happens to dopamine receptors in the brain as heroin addiction develops?
Dopamine receptors are resorbed, leading to decreased dopamine sensitivity.
What is the effect of a depleted reward system on a drug addict?
A depleted reward system makes a drug addict less sensitive to the rewarding neurotransmitter.
Which of the following best describes negative reinforcement?
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What happens during withdrawal from opiates?
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What is sensitization?
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