Benzodiazepines bind at what receptor?

Benzodiazepines bind at what receptor?

• A. GABA
• B. Dopamine D2
• C. NMDA
• D. Serotonin 5-HT2A

Answer: (A)

Benzodiazepines modulate GABAergic transmission by binding to the GABA-A receptor. They attach to a specific benzodiazepine site on the GABA-A receptor complex and act as positive allosteric modulators, meaning they enhance the effect of GABA, the brain’s main inhibitory neurotransmitter. This increases chloride influx, hyperpolarizes neurons, and reduces neuronal excitability, producing anxiolytic, sedative, anticonvulsant, and muscle-relaxant effects. They do not directly activate dopamine D2, NMDA, or serotonin 5-HT2A receptors, which is why those receptors are not the target for benzodiazepines.

Benzodiazepines modulate GABAergic transmission by binding to the GABA-A receptor. They attach to a specific benzodiazepine site on the GABA-A receptor complex and act as positive allosteric modulators, meaning they enhance the effect of GABA, the brain’s main inhibitory neurotransmitter. This increases chloride influx, hyperpolarizes neurons, and reduces neuronal excitability, producing anxiolytic, sedative, anticonvulsant, and muscle-relaxant effects. They do not directly activate dopamine D2, NMDA, or serotonin 5-HT2A receptors, which is why those receptors are not the target for benzodiazepines.