Sarcoplasmic ReticulumMuscle ContractionCalcium-Transporting ATPasesMusclesCalciumSarcoplasmic Reticulum Calcium-Transporting ATPasesEndoplasmic ReticulumRabbitsMuscle, SkeletalRyanodine Receptor Calcium Release ChannelCaffeineMuscle ProteinsMuscle, SmoothRyanodineCalsequestrinMyocardial ContractionIsometric ContractionMuscle Fibers, SkeletalMyocardiumCalcium-Binding ProteinsMuscle, Smooth, VascularCalcium SignalingAdenosine TriphosphateCa(2+) Mg(2+)-ATPaseCalcium ChannelsKineticsElectric StimulationMuscle FatigueMyofibrilsRuthenium RedMuscle Fibers, Fast-TwitchMyocytes, CardiacExcitation Contraction CouplingAdenosine TriphosphatasesSarcolemmaSodium-Calcium ExchangerMagnesiumDogsMuscle RelaxationMuscle DevelopmentEgtazic AcidCalcium Channels, L-TypeThapsigarginHeart VentriclesPapillary MusclesHeartGuinea PigsMuscle Fibers, Slow-TwitchUterine ContractionDantrolenePhosphorylationTetracaineMicrosomesProcaineTime FactorsMembrane PotentialsMitochondria, MusclePotassium ChlorideBiological Transport, ActiveMicroscopy, ElectronMuscle CellsElectromyographyMyocytes, Smooth MuscleRats, WistarOxalatesRats, Sprague-DawleyPotassiumIntracellular MembranesMalignant HyperthermiaCells, CulturedAction PotentialsMuscle, StriatedDose-Response Relationship, DrugModels, BiologicalIndolesMuscle DenervationCalcium Channel BlockersVasoconstrictionSarcomeresTracheaHydrogen-Ion ConcentrationEnzyme InhibitorsMolecular Sequence DataAdenosine DiphosphateBiological TransportFluorescent DyesCalcium RadioisotopesAmino Acid SequenceBinding SitesEndoplasmic Reticulum StressMuscle SpindlesIsoproterenolMyosinsRana pipiensAnuraPhosphatesProtein BindingElectrophysiologyHalothaneNifedipine