Hydrochloric AcidPotassiumPneumonia, AspirationNitric AcidPotassium ChannelsGastric JuiceDecalcification TechniqueTrifluoroacetic AcidCountercurrent DistributionHydrogen-Ion ConcentrationEsophagusAcidsStomachFluoroacetatesAchlorhydriaParietal Cells, GastricGastric AcidSulfuric AcidsGastric FistulaAlkalosisSodium HydroxideGastric MucosaPentagastrinPepsin AAcidosisAppendixPotassium Channel BlockersPotassium Channels, Inwardly RectifyingDuodenumPotassium, DietarySodium ChloridePotassium DeficiencyPotassium Channels, Voltage-GatedBicarbonatesPotassium CompoundsSpectrophotometry, AtomicSecretinStomach UlcerPotassium IsotopesPotassium Chloride