GlucagonReceptors, GlucagonGlucagon-Secreting CellsInsulinLiverBlood GlucoseSomatostatinIslets of LangerhansGlucoseHypoglycemiaProglucagonGluconeogenesisGlucagon-Like PeptidesPancreatic HormonesPancreatic PolypeptidePancreasEpinephrineGlucagon-Like Peptide 1Rats, Inbred StrainsDogsLiver GlycogenCyclic AMPReceptors, Gastrointestinal HormoneAdenylate CyclaseFastingHormonesC-PeptideHyperglycemiaKineticsSecretinAdenoma, Islet CellLactatesFatty Acids, NonesterifiedBucladesineOxyntomodulin3-Hydroxybutyric AcidArginineSomatostatin-Secreting CellsGastrointestinal HormonesPerfusionGlucagonomaGastric Inhibitory PolypeptideTime FactorsKetone BodiesSecretory RateHydrocortisoneDose-Response Relationship, DrugVasopressinsPhosphorylasesRadioimmunoassayDiabetes Mellitus, ExperimentalMolecular Sequence DataHydroxybutyratesAmino AcidsInsulin-Secreting CellsGlycogenolysisGlycerolCells, CulturedGlucose Clamp TechniqueInsulin Antagonists