Guinea PigsMuscle ContractionIsometric ContractionUterine ContractionMyocardial ContractionMuscle, SmoothGuineaPapua New GuineaElectric StimulationCalciumTracheaNew GuineaIleumSwineMuscle, SkeletalDose-Response Relationship, DrugVasoconstrictionMuscle RelaxationIsotonic ContractionRabbitsHistamineAcetylcholineTime FactorsMuscle, Smooth, VascularAtropineGastrointestinal MotilityPeristalsisPotassium ChlorideElectromyographyMuscle FatigueUrinary BladderCarbacholNorepinephrineAction PotentialsMyocardiumVas DeferensHeartPapillary MusclesMusclesVasoconstrictor AgentsAscorbic Acid DeficiencyDogsSpecies SpecificityNifedipineCalcium Channel BlockersBronchoconstrictionSwine DiseasesDisease Models, AnimalEquatorial GuineaMuscle TonusMyenteric PlexusLungMembrane PotentialsSerotoninPhenylephrinePotassium15-Hydroxy-11 alpha,9 alpha-(epoxymethano)prosta-5,13-dienoic AcidColonRats, WistarNeurokinin AGallbladderAorta, ThoracicSubstance PSus scrofaVentricular FunctionVerapamilIndomethacinIsoproterenolTetrodotoxinAdenosine TriphosphateRats, Sprague-DawleyMuscarinic AntagonistsHeart VentriclesCaffeineElectrophysiologyEnzyme InhibitorsKineticsCells, CulturedMyosin Light Chainsrho-Associated KinasesParasympatholyticsTorqueCatsMyometriumHypersensitivity, DelayedMotor NeuronsSRS-ABronchiStomachReflexTachykininsMesenteric ArteriesIndolesMuscle Fibers, SkeletalAdrenergic alpha-AgonistsPressurePiperidinesMyosinsPyloric AntrumReceptor, Muscarinic M2