Tolerance develops for the use of some drugs because
A. over time, the blood-brain barrier more effectively blocks the movement of the drug from the blood supply into the brain.
B. more of the drug is absorbed by the body's fat stores, leading to the need to use more to get the same effects.
C. the body's compensation for the drug cancels out its effects.
D. the experienced user's expectations cancel out the drug's effects.
Answer: C
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a. It would satisfy the craving for opiates, without producing a rush. b. It would produce effects similar to heroin c. It would produce effects similar to withdrawal from an opiate drug. d. It would have no effect on behavior or experience.
Which of the following can produce a powerful feeling of euphoria ("rush") accompanied by a reduction of anxiety, relaxation, and pain relief with higher doses impairing breathing and causing death?
a. narcotics b. amphetamines c. hallucinogens d. benzodiazepines
What is the biggest reason that researchers select samples from populations and do not select entire populations?
What will be an ideal response?
________ leads the way in incentivizing mass transit and bicycle use over personal vehicle use.
A. Europe B. Brazil C. China D. America