This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General, Subject name: Physiology
[{'content': 'Ligand-gated ionic channel? \nSelect and explain. \nA. VIP receptor, B. GAB AA receptor, C. Norepinephrine receptor, D. GABAB receptor', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. b (GABAA receptor) (Ref. Ganong Physiology 22nd/Chapter 1 and Fig. 1-29)Receptor with Intrinsic Ion Channel: 1. GABA-A, 2. Nicotinic cholinergic, 3. NMDA, and 4. 5-HT3 receptors.GABA receptors LocationDrugs which bind them GABA-A receptorNeuronal membranes in CNSBenzodiazepinesBarbituratesZolpidem and many othersGABA-B receptorsCoupled to G proteins that either inhibit Ca++ channels or activate K+ channelsSelectively activated by Baclofen', 'role': 'assistant'}]