Question

Ethanol mimics the effects of GABA, in this way, ethanol functions as a(n) ________?

1) agonist
2) antagonist
3) inhibitor
4) excitant

Answer 1

Ethanol acts as an agonist for GABA receptors, meaning it mimics the neurotransmitter's inhibitory effects on the brain by promoting the activity of these receptors.

Step-by-step explanation:

Ethanol mimics the effects of GABA, and in this way, it functions as a agonist. GABA, or gamma-Aminobutyric acid, is the main inhibitory neurotransmitter in the central nervous system. When ethanol acts on the brain, it binds to GABA receptors and promotes the activity of these receptors in a similar manner as GABA itself would, causing an inhibitory, or quieting, effect on the brain. This includes increasing the influx of chloride ions into neurons, which leads to hyperpolarization of the neuron and decreases its excitability. Other drugs that work as GABA agonists include barbiturates and benzodiazepines.