Vas DeferensMuscle, SmoothMuscle ContractionEpididymisGuinea PigsNorepinephrineNeuroeffector JunctionVasa VasorumVasectomyElectric StimulationAdrenergic alpha-AntagonistsReserpinePrazosinBretylium CompoundsTyramineGenitalia, MaleReceptors, Adrenergic, alphaIleumHypogastric PlexusClonidineYohimbineGuanethidineVasovasostomyAdrenergic alpha-AgonistsXylazineReceptors, AdrenergicSuraminSeminal VesiclesSympathetic Nervous SystemPhenoxybenzamineCyclopentolateCystic Fibrosis Transmembrane Conductance RegulatorAdenosine TriphosphateBarium CompoundsReceptors, OpioidAdrenergic alpha-1 Receptor AntagonistsReceptors, PurinergicTestisAdrenergic FibersMethoxamineOxymetazolineAutonomic AgentsHeptanolSynaptic TransmissionPhentolamineOxathiinsEndorphinsCystamineBrocresineProstateAutonomic Fibers, PostganglionicNeurotransmitter AgentsReceptors, Adrenergic, alpha-1Receptors, Purinergic P2XUrogenital AbnormalitiesSpermatozoaRats, Inbred StrainsIndoraminSecologanin Tryptamine AlkaloidsSpermatic CordMoxisylyte