Muscle ContractionIsometric ContractionMuscle, SmoothMusclesMuscle, SkeletalUterine ContractionMuscle, Smooth, VascularMyocardial ContractionMuscle ProteinsMuscle Fibers, SkeletalMuscle FatigueElectric StimulationCalciumMuscle RelaxationElectromyographyMuscle DevelopmentGuinea PigsVasoconstrictionRabbitsMuscle Fibers, Fast-TwitchTracheaIsotonic ContractionMuscle Fibers, Slow-TwitchMuscle SpindlesPotassium ChlorideMyocytes, Smooth MusclePeristalsisAcetylcholineMyosinsGastrointestinal MotilityPapillary MusclesMyosin Light ChainsMotor NeuronsMuscle DenervationDose-Response Relationship, DrugTime FactorsMyofibrilsUrinary BladderBiomechanical PhenomenaRats, Sprague-DawleyRats, WistarVasoconstrictor AgentsMitochondria, MuscleMuscle, StriatedTorqueCarbacholMuscle TonusActinsNorepinephrineNeck Musclesrho-Associated KinasesSarcomeresPhenylephrineHindlimbIleumDogsTropomyosinAtropineOculomotor MusclesQuadriceps MuscleTroponin CAorta, ThoracicAbdominal MusclesRespiratory MusclesCatsCaffeineMuscle WeaknessActomyosinAdenosine TriphosphateMuscle CellsDiaphragmReflexNifedipineFacial MusclesPhysical ExertionNeuromuscular JunctionPotassiumMyocardiumMyographyCells, Cultured15-Hydroxy-11 alpha,9 alpha-(epoxymethano)prosta-5,13-dienoic AcidModels, BiologicalVas DeferensSerotoninEnzyme InhibitorsMyosin-Light-Chain KinaseMasticatory MusclesCalcium Channel BlockersPhosphorylationStress, MechanicalHistaminePressureMesenteric ArteriesAction PotentialsTroponinAortaCholinergic AgonistsCalcium SignalingPsoas MusclesArteries