NorepinephrineNeurotransmitter AgentsPhenoxybenzamineTyramineEpinephrineAdrenergic alpha-AntagonistsPhentolamineReserpineDesipramineElectric StimulationVas DeferensCatecholaminesSympathetic Nervous SystemAdrenergic alpha-AgonistsPrazosinReceptors, AdrenergicReceptors, Adrenergic, alphaSerotoninMetaraminolYohimbineHydroxydopaminesDopaminePropranololSympathomimeticsMuscle ContractionNeurotransmitter Transport ProteinsGuanethidineSynaptic TransmissionSympatholyticsClonidineAcetylcholineMethyltyrosinesGuinea PigsNictitating MembraneBretylium CompoundsNeuronsReceptors, Adrenergic, alpha-2Dose-Response Relationship, DrugCalciumReceptors, NeurotransmitterMuscle, SmoothIsoproterenolReceptors, Adrenergic, alpha-1CatsMethoxaminePlasma Membrane Neurotransmitter Transport ProteinsMesenteric ArteriesRats, Inbred StrainsNerve EndingsIdazoxanDioxanesRabbitsRats, WistarSynaptic VesiclesAdrenergic Uptake InhibitorsMethoxyhydroxyphenylglycolCocaineVasoconstrictionAdrenergic alpha-2 Receptor Antagonistsgamma-Aminobutyric AcidSynaptosomesPargylinePotassiumArteriesDopamine beta-HydroxylaseMuscle, Smooth, VascularBiogenic MonoaminesGlutamic AcidRats, Sprague-DawleyTritiumAtropineVasoconstrictor AgentsSynapsesBrainPresynaptic TerminalsReceptors, Adrenergic, betaTime FactorsBlood PressureNorepinephrine Plasma Membrane Transport ProteinsTetrodotoxinOxymetazolineBiogenic AminesAdrenergic alpha-1 Receptor AntagonistsMembrane PotentialsNeuromuscular JunctionAdrenergic AgonistsDrug InteractionsPotassium ChlorideTailAdrenergic beta-AntagonistsIproniazidDihydroxyphenylalanineBrain ChemistryHypothalamusStimulation, ChemicalHexamethonium CompoundsDibenzylchlorethamineHeart RatePerfusionPhenylephrine