Muscle RelaxationMuscle ContractionMuscle, SmoothMusclesMuscle, SkeletalMuscle, Smooth, VascularMuscle ProteinsIsometric ContractionMuscle Fibers, SkeletalRelaxation TherapyMuscle FatigueMuscle DevelopmentElectric StimulationVasodilationTracheaCalciumAcetylcholineMyocardial ContractionNitric OxideMuscle Fibers, Fast-TwitchElectromyographyRabbitsGuinea PigsMuscle Fibers, Slow-TwitchRelaxationMuscle DenervationMyocytes, Smooth MuscleDose-Response Relationship, DrugCyclic GMPVasodilator AgentsMuscle TonusNitroprussideMitochondria, MuscleMuscle SpindlesTime FactorsPapillary MusclesRats, Sprague-DawleyUterine ContractionVasoconstrictionEndothelium, VascularAorta, ThoracicMuscle, StriatedRats, WistarNeck MusclesOculomotor MusclesNitroarginineBiomechanical PhenomenaRespiratory MusclesDogsPhenylephrineAortaPotassium ChlorideMuscle WeaknessHSP20 Heat-Shock ProteinsEnzyme InhibitorsPenisMyofibrilsAbdominal MusclesVasoconstrictor AgentsMuscle CellsBiological FactorsQuadriceps MuscleNeuromuscular JunctionIsoproterenolNorepinephrineDeuteroporphyrinsFacial MusclesNG-Nitroarginine Methyl EsterMesenteric ArteriesOxadiazolesNitric Oxide SynthaseKineticsNitric Oxide DonorsHindlimbMasticatory MusclesMembrane PotentialsNeuromuscular BlockadeMotor NeuronsAdenosine TriphosphateMasseter MuscleCells, CulturedNeuromuscular Nondepolarizing AgentsCatsSarcomeresPeristalsisMyosin-Light-Chain PhosphataseActinsPhosphorylationMyocardiumGuanylate CyclaseIntercostal MusclesDiaphragmCarbacholMagnetic Resonance SpectroscopySignal TransductionGastric FundusPsoas MusclesCyclic GMP-Dependent Protein KinasesVasoactive Intestinal PeptideArteries