IleumGuinea PigsMyenteric PlexusMuscle, SmoothDiphenylacetic AcidsMuscle ContractionSubmucous PlexusPeristalsisParasympatholyticsAtropineSRS-AHistamine AntagonistsCaulerpaAcetylcholineVas DeferensReceptors, OpioidTachykininsAutacoidsReceptors, Neurokinin-3OxotremorineElectric StimulationReceptors, Serotonin, 5-HT4HexamethoniumMuscarinic AgonistsMorphinansXylopiaEnteric Nervous SystemSteviaPyrilamineEndorphinsGastrointestinal MotilityMorphineReceptors, MuscarinicMuscarinic AntagonistsSubstance PReceptor, Muscarinic M2Toxins, BiologicalReceptors, Neurokinin-1CarbacholHistamineNaloxoneAnaphylatoxinsEtorphineDose-Response Relationship, DrugIntestinal MucosaPiperidinesReceptor, Muscarinic M3TetrodotoxinEnkephalin, MethionineGuineaPirenzepineBiological AssaySerotoninPapaverineNarcotic AntagonistsReceptors, Opioid, muSerotonin AntagonistsPapua New GuineaRabbitsOpioid PeptidesBinding, CompetitiveSwineEnkephalinsCalciumReceptors, Opioid, deltaAnalgesics, OpioidRadioligand AssayOligopeptidesNew GuineaBradykininPlant ExtractsIleitisStructure-Activity RelationshipIntestine, SmallIleal DiseasesIndolesNeuronsPeptidesExcitatory Postsynaptic PotentialsSynaptic TransmissionColonSpecies SpecificityKineticsIntestinesSwine DiseasesIleal NeoplasmsIntestinal AbsorptionTracheaDuodenumAscorbic Acid DeficiencyCecum