Effects of Alcohol and Drug Abuse: Body Systems, Risks, and Prevention Practice Test

Tolerance arises when the body adapts to regular drug exposure, dampening the effect so the same dose produces a weaker response and people often need larger amounts to achieve the same effect. Dependence is an adaptive state of the brain and body that makes normal functioning rely on the drug; when use stops or is reduced, withdrawal symptoms appear as the body readjusts. Withdrawal is the collection of physical and psychological symptoms that occur during reduced intake or cessation after dependence has developed, such as tremors, anxiety, sweating, and autonomic changes. These ideas fit together but describe different aspects: tolerance is about needing more to feel the same effect, dependence is the body’s adaptation to continuous use, and withdrawal is the symptom set that happens when stopping after dependence. The other statements mix up sensitivity, the nature of withdrawal, or whether symptoms are physical vs. psychological, which is why they’re not correct.