ReflexVasoconstrictionVasoconstrictor AgentsReflex, StretchReflex, AbnormalNorepinephrineSympathetic Nervous SystemVascular ResistanceMesenteric ArteriesVasomotor SystemRegional Blood FlowBlood PressurePhenylephrineReflex, AcousticForearmTyramineReflex, Vestibulo-OcularReflex, Pupillary15-Hydroxy-11 alpha,9 alpha-(epoxymethano)prosta-5,13-dienoic AcidElectric StimulationEndothelin-1MethoxamineEndothelinsRenal CirculationAdrenergic FibersAngiotensin IIVasodilationVasodilator AgentsAdrenergic alpha-AgonistsAdrenergic alpha-AntagonistsDogsDose-Response Relationship, DrugNG-Nitroarginine Methyl EsterArteriesHeart RatePressoreceptorsNitric OxideSerotoninSplenic ArteryRats, Sprague-DawleyMuscle, Smooth, VascularSplanchnic CirculationArteriolesPerfusionTailBretylium TosylateCold TemperaturePhentolamineAdrenergic alpha-1 Receptor AgonistsPotassium ChlorideNitroprussideSkin TemperatureReceptors, EndothelinHemodynamicsPulmonary CirculationElectromyographyIndomethacinAcetylcholineMuscle ContractionCatsHindlimbPrazosinReceptors, Adrenergic, alphaMuscle TonusDecerebrate StateGuanethidineReceptor, Endothelin AProstaglandin Endoperoxides, SyntheticLaser-Doppler FlowmetryBretylium CompoundsReceptor, Endothelin BNitric Oxide SynthaseRenal ArteryThromboxane A2Endothelium, VascularLower Body Negative PressureBlood VesselsEnzyme InhibitorsPlethysmographyRats, WistarMeclofenamic AcidSkinMethysergideKidneyH-ReflexMuscle, SkeletalMidodrineomega-N-MethylarginineReflex, RightingReceptors, Adrenergic, alpha-1Hydroxyeicosatetraenoic AcidsAnoxiaClonidineViper VenomsProstaglandinsRabbitsReflex, OculocardiacArginineArginine VasopressinRats, Inbred SHR