<prompt> Glucagon acts viacAMPcGMPCytoplasmic CaIntracellular K  <response>: Ans. a cAMP G-protein receptor for glucagon is Gs which acts via Adenylyl cyclase causing cAMP.G Proteins and Their Receptors and EffectorsG ProteinReceptors for:Effector Signaling PathwayGt1, Gt2Photons rhodopsin and color opsins in retinal rod and cone cellscGMP phosphodiesterase- cGMP phototransductionG5b-Adrenergic amines, glucagon, histamine, serotonin, and many other hormonesAdenylyl cyclase- campGi1 Gi2 Gi3a2-Adrenergic amines, acetylcholine muscarinic, opioids, serotonin, and many othersSeveral, including: Adenylyl cyclase - cAMPOpen cardiac K channels- heart rateG5b-Adrenergic amines, glucagon, histamine, serotonin, and many other hormonesAdenylyl cyclase-- cAMPGolfOdorants olfactory epitheliumAdenylyl cyclase- cAMPGqAcetylcholine muscarinic, bombesin, serotonin 5-HT1C, and many othersPhospholipase C- IP3, diacylglycerol, cytoplasmic Ca2 