Receptors, GlucagonGlucagonAdenylate CyclaseAdenylate Cyclase ToxinCyclic AMPReceptors, Gastrointestinal HormoneOxyntomodulinGuanylyl ImidodiphosphateGlucagon-Secreting CellsLiverAdenylate KinaseGuanylate CyclaseGuanosine TriphosphateGlycogenolysisCell MembraneColforsinPituitary Adenylate Cyclase-Activating PolypeptideKineticsInsulinGTP-Binding Protein alpha Subunits, GsEnzyme ActivationReceptors, Cell SurfaceGlucagon-Like PeptidesGlucagon-Like Peptide 1FluoridesIsoproterenolGlucoseSodium FluorideCholera ToxinRats, Inbred Strains