Which is a logical implication drawn from the observation that a majority of heroin abusers who complete the withdrawal process relapse to their former pattern of abuse?
a) Drug dependence is caused by something more than physical dependence alone
b) Drug dependence is caused by psychological dependence alone.
c) Physical dependence is more severe than psychological dependence.
d) Physical dependence is the sole cause of drug dependence.
Question 2
What was the American government's attitude toward drugs and drug-related behavior prior to the 20th century?
a) There was little regulation and control
b) Nonmedical use of opiates and stimulants was illegal.
c) All drugs were illegal, and use resulted in strict penalties and incarceration.
d) Alcohol was considered to be a healthy substance, and its use was encouraged by the government.
Emphysema. (a) Illustration comparing normal lungs and emphysemic lungs. The inserts illustrate how
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