IleumTracheaTracheal NeoplasmsGuinea PigsMuscle, SmoothTracheal DiseasesTracheal StenosisMuscle ContractionMuscle RelaxationMyenteric PlexusBronchiIleal DiseasesIleitisHistamineLarynxIntubation, IntratrachealAtropineMucusIntestine, SmallIntestinal MucosaDiphenylacetic AcidsRespiratory SystemAcetylcholineEpitheliumSubstance PTracheotomyBronchoscopyElectric StimulationLungSRS-AIleal NeoplasmsCarbacholMethacholine CompoundsTachykininsNeurokinin AColonAirway ObstructionIntestinesIntestinal AbsorptionParasympathetic Nervous SystemSwineTracheitisGastrointestinal MotilityDuodenumHistamine AntagonistsExocrine GlandsBronchial DiseasesRabbitsDose-Response Relationship, DrugIleocecal ValveDigestive SystemTracheostomyVagus NerveBronchial NeoplasmsPiperidinesVasoactive Intestinal PeptideIsoproterenolIndomethacinCapsaicinOxotremorineMucous MembraneDogsReceptors, MuscarinicMuscarinic AntagonistsParasympatholyticsHexamethonium CompoundsVas DeferensTracheoesophageal FistulaLaryngeal NervesMuscarinic AgonistsPyrilamineLaryngeal CartilagesPirenzepineMucociliary ClearanceAutacoidsTetrodotoxinFiber Optic Technology4,5-Dihydro-1-(3-(trifluoromethyl)phenyl)-1H-pyrazol-3-amineCecumPeristalsisNeurokinin-1 Receptor AntagonistsAporphinesTachyphylaxisAirway ResistanceRespiratory MucosaAdrenergic beta-AgonistsMethacholine ChlorideParasympathomimeticsReceptor, Muscarinic M2Histamine H1 AntagonistsSerotoninNeuroeffector JunctionGastrointestinal Contents