Bronchoconstrictor AgentsBronchoconstrictionAirway ResistanceBronchiBronchial Provocation TestsHistamineMethacholine CompoundsMethacholine ChlorideBronchial HyperreactivityAsthmaGuinea PigsAirway RemodelingAirway ObstructionIpratropiumAdministration, InhalationLungVagotomyNeurokinin AAerosolsRespiratory SystemProstaglandins DCromolyn SodiumBenzeneacetamidesForced Expiratory VolumeHydantoinsBronchodilator AgentsAlbuterolNedocromilReceptors, Neurokinin-2Muscle, SmoothRespiratory Function TestsDose-Response Relationship, DrugVagus NerveThromboxane A2TerbutalineTachykininsSRS-ACapsaicinSubstance PNerve BlockAtropineIndomethacinNeprilysinTracheaPropranololProstaglandin D2Double-Blind MethodAirway ManagementHeart BlockRespiratory MucosaAllergensOvalbuminMuscle ContractionSerotoninAcetylcholineTime FactorsRespiratory HypersensitivityBronchoalveolar Lavage FluidLaryngeal MasksContinuous Positive Airway PressureMucusIntubation, IntratrachealRespiratory MechanicsEosinophilsEpithelial CellsRespiratory Physiological PhenomenaBundle-Branch BlockCystic FibrosisBronchitisAir PressureBronchoscopy