Final answer:
Ethanol, a depressant drug, affects the central nervous system by acting on GABA receptors, with varying effects based on dosage.
Explanation:
Alcohol, specifically ethanol, is a depressant drug that slows down the central nervous system by affecting the neurotransmitter GABA. It can lead to varying effects depending on the dose consumed, including reducing social inhibitions at low to moderate levels and causing loss of consciousness at high levels. Ethanol is widely used but can be dangerous, especially in high quantities.
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