Enterochromaffin CellsParietal Cells, GastricSomatostatinHistamineReceptors, SomatostatinSerotoninNeoplasms, MesothelialH(+)-K(+)-Exchanging ATPaseGastric MucosaGastrinsHistamine ReleaseChromaffin SystemReceptors, Histamine H1Tryptophan HydroxylaseReceptors, Histamine H2Gastric AcidAminopyrineReceptors, HistamineHistamine AntagonistsHistamine AgonistsCarcinoid TumorDuodenumIleal NeoplasmsReceptors, Histamine H3Histamine H1 AntagonistsProctocolitisIntestinal MucosaOctreotideCecal DiseasesHydroxyindoleacetic AcidHistamine H2 AntagonistsParietal BoneReceptors, Serotonin, 5-HT3AchlorhydriaReceptors, Serotonin, 5-HT4Gastrointestinal MotilityIntrinsic FactorVagotomy, Proximal GastricAppendixStomachEnteric Nervous SystemColonChief Cells, GastricAnemia, PerniciousGastric FundusPentagastrinCell CountHistamine N-MethyltransferaseSerotonin AntagonistsCimetidineGastric JuiceGuinea PigsHistidine DecarboxylasePyrilamineIrritable Bowel SyndromeSomatostatin-28ImmunohistochemistryMetiamideSerotonin Plasma Membrane Transport ProteinsMethylhistaminesEnterochromaffin-like CellsDuodenal UlcerCarbacholDimapritHistamine H3 AntagonistsHistamine AgentsPyloric AntrumRabbitsSecretory RateGastritis, AtrophicDumping SyndromeBrain MappingChlorpheniramineGastritisVagotomyMagnetic Resonance ImagingDogs