Muscle ContractionMusclesMyocardiumMuscle ProteinsMuscle, SkeletalMuscle, SmoothHeartMuscle Fibers, SkeletalCell MembraneMyocytes, CardiacMyocardial ContractionMuscle, Smooth, VascularIsometric ContractionCalciumCells, CulturedMyofibrilsMyocytes, Smooth MuscleMuscle DevelopmentSarcomeresHeart VentriclesMembrane PotentialsMuscle FatigueCardiomegalyPapillary MusclesTime FactorsRabbitsMuscle CellsGuinea PigsRats, Sprague-DawleyMicroscopy, ElectronMembranesMuscle Fibers, Fast-TwitchActinsMyosinsMuscle RelaxationElectric StimulationSarcolemmaMuscle Fibers, Slow-TwitchMembrane LipidsSignal TransductionSarcoplasmic ReticulumIntracellular MembranesMuscle DenervationMolecular Sequence DataMitochondria, MuscleElectromyographyCell Membrane PermeabilityCatsGene Expression RegulationMuscle SpindlesMuscle, StriatedAnimals, NewbornAtrial Natriuretic FactorRats, WistarModels, BiologicalUterine ContractionTroponin CAortaDogsGATA4 Transcription FactorNeck MusclesErythrocyte MembraneDose-Response Relationship, DrugMembranes, ArtificialOculomotor MusclesRNA, MessengerCell DifferentiationBase SequenceKineticsFluorescent Antibody TechniqueTropomyosinTracheaTroponinRespiratory MusclesGene ExpressionMuscle WeaknessPotassiumAdenosine TriphosphateHeart AtriaMyosin Heavy ChainsChick EmbryoAbdominal MusclesTransfectionCell LineBiomechanical PhenomenaQuadriceps MuscleMembrane FluidityCardiac OutputAmino Acid SequenceMitochondria, HeartVasoconstrictionPhosphorylationMuscular DiseasesTroponin IFacial MusclesAction PotentialsPotassium ChlorideAcetylcholineElectrophysiologyHindlimb