Muscle Fibers, Slow-TwitchMusclesMuscle ContractionMuscle Fibers, Fast-TwitchArsenazo IIISnakesRana temporariaHeptaminolMuscle Fibers, SkeletalMuscle, SkeletalMuscle DenervationAnuraRana pipiensHypertonic SolutionsSarcoplasmic ReticulumCalciumMitochondriaMuscle ProteinsCalcium-Transporting ATPasesMembrane PotentialsRabbitsMyofibrilsElectric StimulationMotor NeuronsNeuromuscular JunctionNeural ConductionMuscle, SmoothMuscle DevelopmentTime FactorsCatsMitochondria, MuscleMitochondria, LiverIsometric ContractionMotor EndplateNerve FibersAction PotentialsMuscle, Smooth, VascularDiaphragmMuscle FatigueMyosin Heavy ChainsSarcomeresMuscle SpindlesElectromyographyTetrodotoxinMuscle RelaxationMitochondria, HeartPsoas MusclesOculomotor MusclesPapillary MusclesDietary FiberElectrophysiologyMuscular AtrophyPotassiumMyocardiumMuscular DiseasesMuscle, StriatedHindlimbMuscle WeaknessQuadriceps MuscleRespiratory MusclesKineticsMicroscopy, ElectronMyosinsBiomechanical PhenomenaThoracicaCaffeineMasseter MuscleTubocurarineMuscular Dystrophy, AnimalNeck MusclesMyocytes, Smooth MuscleRats, WistarHistocytochemistryAbdominal MusclesMasticatory MusclesSatellite Cells, Skeletal MuscleSarcolemmaMolecular Sequence DataAdenosine TriphosphateRanidaeMineral FibersModels, BiologicalIntercostal MusclesMyocardial ContractionNeuromuscular Nondepolarizing AgentsOxygen ConsumptionNeuromuscular Blocking AgentsRana esculentaMice, Inbred mdxRats, Sprague-DawleyTetanyMuscle CellsCells, CulturedPurkinje FibersSuccinylcholineFacial MusclesPhrenic NerveMitochondrial ProteinsBase SequencePectoralis Muscles