VasoconstrictionVasoconstrictor AgentsVascular ResistanceRegional Blood FlowPulmonary CirculationAnoxiaArteriolesPulmonary ArteryBlood PressureVasodilationEndothelin-1NorepinephrineShiveringForearmSkin TemperatureRenal CirculationPhenylephrineMesenteric ArteriesVasomotor SystemBody Temperature RegulationHemodynamicsMuscle, Smooth, VascularReceptors, EndothelinAdrenergic alpha-1 Receptor AgonistsAdrenergic alpha-AgonistsVasodilator AgentsSympathetic Nervous SystemNitric OxideEndothelinsPerfusionReceptor, Endothelin AAdrenergic alpha-AntagonistsDogsArteriesAngiotensin IIDose-Response Relationship, DrugReceptor, Endothelin B15-Hydroxy-11 alpha,9 alpha-(epoxymethano)prosta-5,13-dienoic AcidNG-Nitroarginine Methyl EsterReceptors, Adrenergic, alphaRats, Sprague-DawleyHeadache Disorders, PrimaryMethoxamineCoronary VesselsTyramineSplanchnic CirculationEndothelium, VascularViper VenomsHeart RatePrazosinMicrocirculationNitric Oxide SynthaseMeclofenamic AcidPeptides, CyclicPotassium ChlorideEnzyme InhibitorsAcetylcholineKidneyPhentolamineReceptors, Adrenergic, alpha-1Hypertension, PulmonaryOxygenRats, WistarLaser-Doppler FlowmetryNitroprussideIndomethacinCardiac OutputReceptors, ThromboxaneThromboxane A2Blood VesselsReceptors, Adrenergic, alpha-2PlethysmographyBlood Flow VelocityLungAzepinesRenal ArteryLower Body Negative PressureCold Temperaturerho-Associated KinasesReceptors, Neuropeptide YPropranololInjections, Intra-ArterialSkinBlood SubstitutesMuscle TonusTailCoronary CirculationMyographyCerebral Arteriesomega-N-MethylarginineThromboxanesSweatingSerotoninMuscle ContractionElectric StimulationReflexSwinePhenoxybenzamineNitroarginineInfusions, Intra-Arterial