Acute alcohol intoxication primarily affects which body system, and what is a primary immediate symptom?

• A. The central nervous system; impaired coordination and judgment (slurred speech, slowed reaction time)
• B. The gastrointestinal system; stomach pain and vomiting
• C. The cardiovascular system; chest pain and elevated heart rate
• D. The immune system; increased infection risk

Answer: (A)

Acute alcohol intoxication primarily depresses the central nervous system. This immediate effect shows up as impaired coordination and judgment, with common signs like slurred speech and slowed reaction time. Ethanol dampens brain activity by enhancing inhibitory signals and reducing excitatory signals, which slows processing and disrupts motor control, especially in areas like the cerebellum and frontal regions responsible for coordination and decision-making. While the GI tract, heart, or immune responses can be affected in various ways, they are not the primary immediate system involved in acute intoxication. So the central nervous system impact, producing impaired coordination and judgment, best explains the first, most noticeable consequence.