PhentolamineAdrenergic alpha-AntagonistsPropranololReceptors, Adrenergic, alphaNorepinephrineReceptors, AdrenergicPhenoxybenzamineSympatholyticsEpinephrinePrazosinYohimbineAtropineAdrenergic alpha-AgonistsClonidineAdrenergic beta-AntagonistsSympathetic Nervous SystemElectric StimulationSympathomimeticsMethysergideGuanethidineIsoproterenolAdrenergic AntagonistsMuscle ContractionReserpineHexamethonium CompoundsAutonomic AgentsCatecholaminesBretylium CompoundsGuinea PigsPhenylephrineAdrenergic alpha-2 Receptor AntagonistsAdrenergic alpha-1 Receptor AntagonistsBlood PressureDogsTyramineHeart RateMuscle, SmoothDihydroergotoxineReceptors, Adrenergic, betaDose-Response Relationship, DrugVas DeferensMoxisylyteOxymetazolinePapaverineMethoxamineErgoloid MesylatesDibenzylchlorethamineVasoconstrictionNeuromuscular BlockadeRegional Blood FlowDesipramineTolazolineAutonomic Fibers, PostganglionicCatsHydroxydopaminesErgotamineDrug InteractionsParasympatholyticsGanglionic BlockersDioxanesPractololButoxamineRats, Inbred StrainsAmino AlcoholsDibenzazepinesAutonomic Nerve BlockRats, Sprague-DawleyParasympathetic Nervous SystemHexamethoniumStimulation, ChemicalVascular ResistanceAlprenololNicergolineRabbitsOctopamineAcetylcholineTetrodotoxinHeartHemodynamicsAdrenergic AgonistsNeuroeffector JunctionIdazoxanMuscle, Smooth, VascularBretylium TosylateAutonomic Nervous SystemSerotoninMetaraminolAdrenergic AgentsPenile ErectionVagus NerveAdrenergic beta-AgonistsTripelennamineSynaptic TransmissionTetralonesVasodilationNictitating MembraneAdrenergic FibersArteriesRats, WistarMembrane Potentials