VasoconstrictionSerotoninReceptors, SerotoninSerotonin Plasma Membrane Transport ProteinsReceptor, Serotonin, 5-HT2AReceptor, Serotonin, 5-HT1ASerotonin Uptake InhibitorsSerotonin AntagonistsReceptor, Serotonin, 5-HT2CReceptor, Serotonin, 5-HT1BSerotonin Receptor AgonistsReceptor, Serotonin, 5-HT2BReceptors, Serotonin, 5-HT2Serotonin AgentsVasoconstrictor AgentsReceptors, Serotonin, 5-HT1Serotonin 5-HT2 Receptor AntagonistsSerotonin SyndromeVascular ResistanceRegional Blood FlowReceptors, Serotonin, 5-HT3Pulmonary CirculationSerotonin 5-HT2 Receptor AgonistsNorepinephrineTryptophan HydroxylaseAnoxiaSerotonin 5-HT1 Receptor AgonistsReceptors, Serotonin, 5-HT4Pulmonary ArteryBlood PressureArteriolesVasodilationSerotonin 5-HT1 Receptor AntagonistsKetanserinEndothelin-1Dose-Response Relationship, DrugPhenylephrineShiveringRats, Sprague-DawleyForearmSkin TemperatureMesenteric ArteriesRenal CirculationMuscle, Smooth, VascularVasomotor SystemBody Temperature RegulationHemodynamicsAdrenergic alpha-AgonistsMethysergideVasodilator AgentsHydroxyindoleacetic AcidReceptors, EndothelinAdrenergic alpha-1 Receptor AgonistsSympathetic Nervous SystemNitric OxideAdrenergic alpha-AntagonistsPerfusionDogsReceptor, Serotonin, 5-HT1DEndothelinsFluoxetine15-Hydroxy-11 alpha,9 alpha-(epoxymethano)prosta-5,13-dienoic AcidReceptor, Endothelin AArteriesCitalopramAngiotensin IIReceptors, Adrenergic, alphaSerotonergic Neurons5-HydroxytryptophanNG-Nitroarginine Methyl EsterTyramineRaphe NucleiReceptor, Endothelin BCoronary VesselsMethoxamineRats, WistarHeadache Disorders, PrimaryEndothelium, VascularParoxetineHeart RatePrazosin8-Hydroxy-2-(di-n-propylamino)tetralinSplanchnic CirculationMicrocirculationFenclonineAcetylcholineViper VenomsPotassium ChlorideNitric Oxide SynthaseEnzyme InhibitorsTryptaminesMethiothepinCyproheptadineHypertension, PulmonaryPhentolamineMeclofenamic Acid5,7-DihydroxytryptaminePeptides, CyclicReceptors, Adrenergic, alpha-1Kidney