National Certified Addiction Counselor, Level I (NCAC I) Practice Exam

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Which of the following is considered a CNS depressant?

  1. Stimulants

  2. Hallucinogens

  3. Alcohol

  4. Cannabinoids

The correct answer is: Alcohol

CNS depressants, or central nervous system depressants, are substances that reduce the activity of the brain and nervous system. They often produce effects such as relaxation, drowsiness, and a decrease in alertness. Alcohol is one of the most well-known CNS depressants, as it acts on the GABA receptors in the brain, enhancing the effects of this neurotransmitter, which leads to sedation and reduced anxiety. The other substances listed serve different roles: stimulants increase alertness and energy, hallucinogens primarily alter perception and can induce hallucinations, and cannabinoids, while they can have calming effects, do not primarily act as depressants in the manner that alcohol does. Understanding these classifications is crucial for recognizing how different substances affect the body and mind, especially in the context of addiction counseling.