The following receptor has an intrinsic ion channel: (A) Histamine H1 receptor, (B) Histamine H2 receptor, (C) Adrenergic alfa receptor, (D) GABA-benzodiazepine receptor
Answer is D. GABA -BDZ receptor is an ion channel receptor , has an intrinsic Cl ion channel opening when a agonist binds to it and causes increase in frequency of channel opening and causes hyperpolarization. KDT 6/ e pg 42