HelichrysumIleumSideritisMuscle ContractionGuinea PigsIsometric ContractionUterine ContractionMuscle, SmoothMyocardial ContractionElectric StimulationCalciumMuscle, SkeletalIsotonic ContractionVasoconstrictionGastrointestinal MotilityMuscle RelaxationPeristalsisAcetylcholineAtropineMuscle, Smooth, VascularMuscle FatigueElectromyographyPotassium ChlorideMyenteric PlexusRabbitsDose-Response Relationship, DrugVas DeferensTracheaUrinary BladderCarbacholNorepinephrineVasoconstrictor AgentsMusclesColonRats, WistarIleitisNifedipineIntestine, SmallSerotoninHistamineIleal DiseasesTime FactorsPhenylephrineDogsRats, Sprague-DawleyAorta, ThoracicMuscle TonusIntestinal MucosaTorqueDuodenum15-Hydroxy-11 alpha,9 alpha-(epoxymethano)prosta-5,13-dienoic AcidPotassiumMyosin Light Chainsrho-Associated KinasesTetrodotoxinCalcium Channel BlockersMotor NeuronsSwineVerapamilSubstance PCaffeineMesenteric ArteriesIndomethacinMyometriumAdrenergic alpha-AgonistsNeurokinin AMuscle Fibers, SkeletalMyosinsMuscarinic AntagonistsTachykinins