Muscle ContractionMusclesMuscle, SkeletalIsometric ContractionElectromyographyPhosphocreatineMuscle, SmoothElectric StimulationUterine ContractionAdenosine TriphosphateMuscle, Smooth, VascularModels, BiologicalMyocardial ContractionMuscle ProteinsMuscle Fibers, SkeletalMuscle FatigueCalciumMuscle RelaxationMuscle 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 WeaknessActomyosinMuscle CellsDiaphragmReflexNifedipineFacial MusclesPhysical ExertionNeuromuscular JunctionPotassiumMyocardiumMyographyCells, Cultured15-Hydroxy-11 alpha,9 alpha-(epoxymethano)prosta-5,13-dienoic AcidVas DeferensSerotoninEnzyme InhibitorsMyosin-Light-Chain KinaseMasticatory MusclesCalcium Channel BlockersPhosphorylationStress, MechanicalHistaminePressureMesenteric ArteriesAction PotentialsTroponinAortaCholinergic AgonistsCalcium SignalingPsoas Muscles