IsoproterenolAdrenergic beta-AgonistsReceptors, Adrenergic, betaPropranololPractololMetaproterenolAdrenergic beta-AntagonistsReceptors, AdrenergicPropanolaminesGuinea PigsSympathomimeticsAmino AlcoholsPhenoxybenzamineTracheaEpinephrineNorepinephrinePhentolamineMuscle RelaxationMuscle, SmoothSympatholyticsPhenoxypropanolaminesCyclic AMPPindololAlbuterolHeart RateAdrenergic beta-1 Receptor AntagonistsHeartAdrenergic beta-1 Receptor AgonistsMuscle ContractionHistamineAminophyllinePhenylephrineColforsinMyocardial ContractionStimulation, ChemicalReserpineReceptors, Adrenergic, beta-2CatecholaminesIodocyanopindololReceptors, Adrenergic, beta-1TropoloneDose-Response Relationship, DrugPhenoxyacetatesEthanolaminesAdrenergic beta-2 Receptor AntagonistsMyocardiumAdrenergic AgonistsAtenololFenoterolPapillary MusclesButoxamineCarteololPempidineXamoterolProcaterolAtropineElectric StimulationReceptors, Adrenergic, beta-3CarbacholAdrenergic beta-2 Receptor AgonistsDogsAcetylcholineHeart AtriaPapaverineAlprenololAdrenergic alpha-AgonistsPropiophenonesDihydroalprenololTolazolineMethacholine CompoundsBupranololAutonomic AgentsReceptors, Adrenergic, alphaButylaminesCatsOxprenololRats, Inbred StrainsMuscle TonusTheophyllineAcetanilidesAdenylate CyclaseBronchodilator AgentsCalciumBlood PressureAirway ResistancePhosphodiesterase InhibitorsParasympatholyticsTerbutalineMembrane PotentialsDrug InteractionsBetaxololPotassiumMoxisylyteAdrenergic alpha-AntagonistsGuanethidineRats, WistarBethanidinePerfusionParotid GlandBronchi