Hydrogen-Ion ConcentrationGastric Acidity DeterminationAcid-Base EquilibriumCarbon DioxideBicarbonatesElectrodesHydrogenElectrodes, ImplantedHydrogen BondingHydrogen PeroxidePotassiumSodiumHydrogen SulfideProtonsCalciumBuffersIon-Selective ElectrodesAcidosisChloridesIonsIon ChannelsElectrochemistryHydrochloric AcidKineticsAcidosis, RespiratoryOsmolar ConcentrationMembrane PotentialsGastric JuiceMagnesiumAcetazolamidePartial PressureAcidosis, Renal TubularIon TransportAlkalosis, RespiratoryBiological Transport, ActiveAmmonium ChlorideCell Membrane PermeabilityElectrophysiologyMicroelectrodesExtracellular SpaceSecretory RateWaterTime FactorsPotentiometryElectrochemical TechniquesTurtlesHelix (Snails)Potassium ChlorideSodium ChlorideTemperatureOxygenSodium BicarbonateModels, BiologicalMetalsElectric ConductivityModels, ChemicalCations, MonovalentDogsPhosphatesIon Channel GatingElectric StimulationCationsAcidsModels, MolecularOxidation-ReductionHypercapniaCobaltLactatesCatsCations, DivalentAmilorideNeuronsSolutionsSodium-Hydrogen AntiporterBiosensing TechniquesGastric MucosaGraphiteFluorocarbon PolymersAequorinIonophoresAction PotentialsDinitrophenolsMathematicsEquipment DesignPentagastrinMembranes, ArtificialBiological TransportGastric AcidThermodynamicsQuaternary Ammonium CompoundsSulfatesBinding SitesManganeseZincEndolymphMolecular Sequence DataGramicidinGoldLasalocidElectrolytes