Adrenergic alpha-AgonistsAdrenergic alpha-AntagonistsAdrenergic alpha-2 Receptor AgonistsIdazoxanDioxanesPrazosinReceptors, Adrenergic, alphaMedetomidineReceptors, Adrenergic, alpha-2DexmedetomidineYohimbinealpha7 Nicotinic Acetylcholine ReceptorReceptors, Adrenergic, alpha-1Adrenergic alpha-1 Receptor AntagonistsAdrenergic alpha-2 Receptor AntagonistsNicotinic AgonistsClonidineReceptors, NicotinicQuinoxalinesAdrenergic alpha-1 Receptor AgonistsNorepinephrineImidazoline ReceptorsNicotinic AntagonistsPhenylephrineDose-Response Relationship, DrugAdrenergic AgonistsImidazolesDrug Partial AgonismOxymetazolineMethoxamineAconitineQuinolizinesRats, Sprague-DawleyDopamine AgonistsBenzylidene CompoundsRadioligand AssayDoxazosinAzepinesalpha 1-AntitrypsinNordefrinIndoraminNicotineAgmatineReceptors, AdrenergicBicyclo Compounds, HeterocyclicDrug InteractionsDihydro-beta-ErythroidineAporphinesVasoconstrictionBicyclo CompoundsVas DeferensGABA AgonistsRats, WistarHypoxia-Inducible Factor 1, alpha SubunitAdrenergic AntagonistsPyridinesGuanfacineTetrahydronaphthalenesQuinuclidinesPiperazinesBinding, CompetitiveHypnotics and SedativesEpinephrineMuscle ContractionMecamylamineDogsBenzazepinesAzetidinesPurinergic P1 Receptor AgonistsIsoxazolesTailElectric StimulationMuscarinic AgonistsIsoproterenolXylazineRats, Inbred StrainsIndolesCells, CulturedMice, Inbred C57BLCalciumPropranololAdrenergic beta-AntagonistsRabbitsBlood PressureSympatholyticsSplenic ArteryReceptors, Adrenergic, betaReceptors, DrugSerotonin 5-HT2 Receptor AgonistsMuscle, Smooth, VascularGABA-A Receptor AgonistsSulfonamidesStereoisomerismSerotonin 5-HT1 Receptor AgonistsCyclic AMPHistamine AgonistsSignal TransductionHeart RateIntegrin alpha3beta1Integrin alpha4