GlucagonReceptors, GlucagonHomeostasisGlucagon-Secreting CellsInsulinLiverBlood GlucoseGlucoseIslets of LangerhansSomatostatinProglucagonHypoglycemiaGluconeogenesisGlucagon-Like PeptidesPancreasPancreatic HormonesPancreatic PolypeptideGlucagon-Like Peptide 1EpinephrineRats, Inbred StrainsLiver GlycogenCyclic AMPFastingReceptors, Gastrointestinal HormoneAdenylate CyclaseHormonesDogsC-PeptideHyperglycemiaSecretinKineticsAdenoma, Islet CellCalciumLactatesBucladesineCells, CulturedFatty Acids, NonesterifiedGastrointestinal HormonesInsulin-Secreting CellsSomatostatin-Secreting CellsGlucose Tolerance TestGastric Inhibitory PolypeptidePerfusionGlucagonoma3-Hydroxybutyric AcidArginineOxyntomodulinKetone BodiesMice, KnockoutSecretory RateDiabetes Mellitus, ExperimentalGlycogenolysisSignal TransductionVasopressinsMice, Inbred C57BLPhosphorylasesHydrocortisoneAmino AcidsTime FactorsRadioimmunoassayHydroxybutyratesCell MembraneGlycogenDose-Response Relationship, DrugGene Expression RegulationInsulin Antagonists