GlucagonReceptors, GlucagonGlucagon-Secreting CellsInsulinLiverSomatostatinBlood GlucoseIslets of LangerhansProglucagonHypoglycemiaGluconeogenesisGlucoseGlucagon-Like PeptidesPancreatic HormonesPancreatic PolypeptidePancreasGlucagon-Like Peptide 1EpinephrineRats, Inbred StrainsLiver GlycogenCyclic AMPReceptors, Gastrointestinal HormoneAdenylate CyclaseFastingDogsHormonesC-PeptideSecretinAdenoma, Islet CellHyperglycemiaBucladesineLactatesSomatostatin-Secreting CellsGlucagonomaKineticsOxyntomodulinFatty Acids, NonesterifiedGastrointestinal HormonesPerfusionGastric Inhibitory Polypeptide3-Hydroxybutyric AcidSecretory RateKetone BodiesArgininePhosphorylasesVasopressinsDiabetes Mellitus, ExperimentalGlycogenolysisHydroxybutyratesRadioimmunoassayHydrocortisoneInsulin-Secreting Cells