Muscle RelaxationLiver Neoplasms, ExperimentalLiverMuscle, SmoothMusclesMuscle ContractionRelaxation TherapyMuscle, Smooth, VascularMuscle, SkeletalMuscle ProteinsMuscle Fibers, SkeletalNitric OxideVasodilationMuscle DevelopmentMuscle FatigueTracheaCyclic GMPDeuteroporphyrinsAcetylcholineHSP20 Heat-Shock ProteinsNeuromuscular BlockadeNitroprussideElectric StimulationNeuromuscular Nondepolarizing AgentsCalciumVasodilator AgentsMuscle Fibers, Fast-TwitchRelaxationIsometric ContractionRabbitsDose-Response Relationship, DrugMuscle DenervationPenisMuscle Fibers, Slow-TwitchMuscle TonusEndothelium, VascularTime FactorsGuinea PigsRats, Sprague-DawleyElectromyographyMyocytes, Smooth MuscleMitochondria, MuscleRats, WistarOpossumsAorta, ThoracicIsoproterenolNitroarginineNitric Oxide DonorsCyclic GMP-Dependent Protein KinasesBiological FactorsPapillary MusclesOxadiazolesOculomotor MusclesNeck MusclesGuanylate CyclaseAnal CanalNitric Oxide SynthaseMuscle, StriatedAortaVasoactive Intestinal PeptideAndrostanolsBromcresol GreenPenile Erectiongamma-CyclodextrinsMuscle SpindlesEnzyme InhibitorsDogsRespiratory MusclesRNA, MessengerMuscle Relaxants, CentralNG-Nitroarginine Methyl EsterMuscle WeaknessNeuromuscular JunctionMyocardial ContractionNitroglycerinAtracuriumKineticsBiomechanical PhenomenaMuscle CellsMyotonia CongenitaSignal TransductionPhenylephrineMembrane PotentialsMolecular Sequence DataCells, CulturedAbdominal MusclesParvalbuminsAdrenergic beta-AgonistsArginineQuadriceps MuscleVasoconstrictionMutationMasseter MuscleVecuronium BromideNorepinephrineMice, Inbred C57BLMyosin-Light-Chain PhosphataseNucleotides, CyclicFacial MusclesImmunohistochemistry