Muscle ContractionCalcium SignalingIsometric ContractionCalcium ChannelsCalcium, DietaryUterine ContractionMyocardial ContractionMuscle, SmoothCalcium CarbonateCalcium ChlorideCalcium IsotopesCalcium PhosphatesElectric StimulationCalcium Channels, L-TypeMuscle, SkeletalVasoconstrictionCalcium RadioisotopesIsotonic ContractionNifedipineCalcium OxalateCalciumMuscle, Smooth, VascularDose-Response Relationship, DrugGuinea PigsCalcium GluconatePotassium ChlorideRabbitsMuscle RelaxationMusclesTime FactorsEgtazic AcidVerapamilMuscle FatigueElectromyographyCalcium Channel AgonistsMembrane PotentialsRats, Sprague-DawleyPotassiumNorepinephrineCaffeineAcetylcholineTracheaRats, WistarCells, CulturedCalcium CompoundsVasoconstrictor AgentsGastrointestinal MotilityCalcium Channels, N-TypeCarbacholUrinary BladderDogsAdenosine TriphosphatePeristalsisCalcimycinKineticsFura-2PhenylephrineAtropineMyocardiumAorta, ThoracicIleumDiltiazemRyanodineMuscle TonusEnzyme InhibitorsElectrophysiologyMagnesiumThapsigarginSerotoninVas DeferensHeartRyanodine Receptor Calcium Release ChannelChelating AgentsPhosphorusMuscle Fibers, Skeletalrho-Associated Kinases15-Hydroxy-11 alpha,9 alpha-(epoxymethano)prosta-5,13-dienoic AcidMyosin Light ChainsMesenteric ArteriesMotor NeuronsCalcium HydroxideSignal TransductionTorqueTetrodotoxinHistamineCalcium-Binding ProteinsMyometriumMyosinsCalcium SulfateParathyroid HormoneNicardipineCytosolIndolesLanthanumModels, BiologicalPatch-Clamp TechniquesSodiumStrontiumAequorinAdrenergic alpha-Agonists