Receptors on cell membrane that activate ion channel after binding with agonists are:: (A) Nicotinic cholinergic, (B) Muscarinic cholinergic, (C) Opioid mu receptors, (D) GABA B receptors
Answer is A. Nicotinic cholinergic and GABAA are inotropic receptor (they are ion channel). Other receptors in the options are G­-protein coupled receptor; known as metabotropic receptor.