Muscle ContractionMusclesKineticsMuscle, SmoothMuscle, SkeletalIsometric ContractionMuscle ProteinsMuscle, Smooth, VascularMuscle Fibers, SkeletalMuscle FatigueElectric StimulationUterine ContractionMyocardial ContractionMuscle DevelopmentCalciumMuscle RelaxationElectromyographyMuscle Fibers, Fast-TwitchMuscle Fibers, Slow-TwitchRabbitsMyocytes, Smooth MuscleMuscle SpindlesGuinea PigsTracheaMuscle DenervationMitochondria, MuscleTime FactorsMuscle, StriatedVasoconstrictionPapillary MusclesNeck MusclesMyofibrilsMyosinsBiomechanical PhenomenaOculomotor MusclesPotassium ChloridePeristalsisMotor NeuronsMyosin Light ChainsTropomyosinHindlimbDose-Response Relationship, DrugRats, Sprague-DawleyActinsRespiratory MusclesIsotonic ContractionAcetylcholineModels, BiologicalMuscle WeaknessQuadriceps MuscleAbdominal MusclesSarcomeresRats, WistarTroponin CMuscle CellsFacial MusclesGastrointestinal MotilityTorqueCarbacholUrinary BladderAdenosine TriphosphateCells, CulturedMasticatory MusclesDiaphragmDogsMuscle Tonusrho-Associated KinasesNeuromuscular JunctionActomyosinPhysical ExertionVasoconstrictor AgentsCatsPsoas MusclesTroponinIleumMyocardiumPhenylephrinePhosphorylationNorepinephrineReflexMasseter MusclePotassiumMuscular DiseasesCaffeineMembrane PotentialsIntercostal MusclesMyosin-Light-Chain KinaseAtropineEnzyme InhibitorsStress, MechanicalAorta, ThoracicActin CytoskeletonSignal TransductionCalcium SignalingAction PotentialsMyographyMyosin Heavy ChainsMuscular AtrophyCholinergic AgonistsSarcoplasmic Reticulum