O Levels Biology (5090)•5090/12/M/J/22

Explanation
Alcohol's Short-Term Neurological Effects
Steps:
- Identify short-term effects as immediate impacts from one episode of heavy drinking, not chronic ones.
- Recall alcohol acts as a depressant on the central nervous system, affecting brain functions like inhibition.
- Evaluate choices: Focus on behavioral changes over physical damage or speed alterations.
- Select the option matching impaired judgment and control from reduced brain activity.
Why C is correct:
- Alcohol depresses the prefrontal cortex, the brain region responsible for executive function, leading to disinhibition and reduced self-control as defined in neuropharmacology.
Why the others are wrong:
- A: Heart tissue damage is a long-term effect from chronic alcoholism, not short-term.
- B: Alcohol slows nerve impulse transmission by enhancing GABA inhibition, not speeding it.
- D: Alcohol impairs coordination, resulting in longer reaction times, not shorter.
Final answer: C
Topic: Mammalian nervous system
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