VasoconstrictionShiveringSkin TemperatureBody Temperature RegulationRegional Blood FlowDivingCardiac OutputHeart RateBlood PressureForearmVascular ResistanceReflexPlethysmographyBody TemperatureSympathetic Nervous SystemHemodynamicsCold TemperatureBaroreflexDogsNorepinephrineLegVasoconstrictor AgentsPeripheral NervesPulmonary CirculationAnoxiaVasodilationPulmonary ArteryArteriolesEndothelin-1PhenylephrineRenal CirculationPeripheral Nervous SystemMesenteric ArteriesPeripheral Nervous System DiseasesVasomotor SystemVasodilator AgentsMuscle, Smooth, VascularAdrenergic alpha-AgonistsReceptors, EndothelinDose-Response Relationship, DrugAdrenergic alpha-1 Receptor AgonistsNitric OxideRats, Sprague-DawleyPeripheral Vascular DiseasesArteriesEndothelinsPerfusionReceptor, Endothelin AAdrenergic alpha-AntagonistsAngiotensin IING-Nitroarginine Methyl EsterReceptor, Endothelin B15-Hydroxy-11 alpha,9 alpha-(epoxymethano)prosta-5,13-dienoic AcidReceptors, Adrenergic, alphaEndothelium, VascularHeadache Disorders, PrimaryCoronary VesselsMethoxamineSplanchnic CirculationTyramineLeukocytes, MononuclearMicrocirculationRats, WistarPeripheral Nerve InjuriesViper VenomsPeripheral Arterial DiseaseTime FactorsNitric Oxide SynthasePrazosinEnzyme InhibitorsKidneyPeptides, CyclicSkinOxygenMeclofenamic AcidPotassium ChlorideAcetylcholinePhentolamineLaser-Doppler FlowmetryLungBlood VesselsBlood Flow VelocityHypertension, PulmonaryIndomethacinNitroprussideReceptors, Adrenergic, alpha-1Thromboxane A2Receptors, ThromboxaneReceptors, Adrenergic, alpha-2Electric StimulationMuscle, SkeletalCells, CulturedAzepinesLower Body Negative PressurePropranololLymphoma, T-Cell, PeripheralInjections, Intra-ArterialRabbitsReceptors, Neuropeptide Yrho-Associated Kinases