<prompt> GABA-B receptors are -G-protein coupled receptorsIntrinsic ion channelEnzyme linked receptorsLigand gated ion channels  <response>: Ans: A. G-protein coupled receptorsRef : KDT e p. 399, 402 6 6he p. 395; Katzung 17the p 377-378; lPe p 355GABA-A receptors:Intrinsic Cl- channets and when open cause increase in CI- conductance and CNS depression.GABA-B receptors:G-protein coupled receptors.Baclofen is agonist and saclofen is antagonist on these receptors. 