Muscle RelaxationMuscle ContractionPhrenic NerveRelaxationRelaxation TherapyRespiratory ParalysisVasodilationIntercostal MusclesAcetylcholineRespiratory MusclesContraceptive Devices, FemaleNitric OxideVasodilator AgentsRespiratory MechanicsMuscle FatigueEndothelium, VascularMuscle, SmoothNitroarginineElectric StimulationBiological FactorsNitroprussidePressureAbdominal MusclesElectromyographyMusclesMuscle, Smooth, VascularAorta, ThoracicRespirationInhalationDogsMagnetic Resonance SpectroscopyDiaphragmatic EventrationIsotonic ContractionDose-Response Relationship, DrugMesenteric ArteriesRats, Sprague-DawleyPodocytesRats, WistarMuscle WeaknessNeuromuscular JunctionMuscle Fibers, SkeletalRibsEsophageal Sphincter, LowerCyclic GMPNG-Nitroarginine Methyl EsterVasoconstrictor AgentsGastric FundusMuscle, SkeletalEsophagusMyocardial ContractionMice, Inbred mdxNitric Oxide SynthaseRabbitsCalciumTime FactorsMethylene BlueLung Volume MeasurementsMyosin Heavy ChainsMuscular Dystrophy, AnimalMuscle DenervationTracheaIndomethacinMotor EndplateCharybdotoxinEsophagogastric JunctionPenisEnzyme InhibitorsOxadiazolesTotal Lung CapacityPotassium ChlorideArginineDiastoleWork of BreathingPhenylephrineNitric Oxide DonorsApamin15-Hydroxy-11 alpha,9 alpha-(epoxymethano)prosta-5,13-dienoic AcidVasoconstrictionGuinea PigsBradykininAortaCoronary VesselsIsoproterenolPleural CavityMuscular AtrophyGuanylate CyclaseMuscle TonusRespiration, ArtificialSwineDecamethonium CompoundsMagneticsTubocurarineMyofibrilsMuscle ProteinsFunctional Residual CapacityAdrenergic beta-AgonistsArteriesRespiratory Physiological PhenomenaVasoactive Intestinal PeptideKidney Glomerulus