Chromaffin SystemChromaffin CellsSympathetic Fibers, PostganglionicChromaffin GranulesAutonomic Fibers, PostganglionicAdrenal MedullaParasympathetic Fibers, PostganglionicGanglia, ParasympatheticCatecholaminesGanglia, SympatheticSympathetic Nervous SystemHexamethonium CompoundsParasympathetic Nervous SystemAdrenal GlandsCattleGanglionic BlockersGanglia, AutonomicBretylium CompoundsExocytosisHorner SyndromeAutonomic Fibers, PreganglionicPempidineChromograninsSuperior Cervical GanglionNorepinephrineElectric StimulationChromogranin AGuanethidineDimethylphenylpiperazinium IodidePentolinium TartrateDopamine beta-HydroxylaseVagus NervePhenylethanolamine N-MethyltransferaseAtropineHypogastric PlexusAcetylcholineTyrosine 3-MonooxygenasePharmacologyNicotineDenervationStellate GanglionCalciumSympathectomyHypohidrosisParasympathomimeticsGangliaTubocurarineNeuronsNictitating MembraneAutonomic Nervous System DiseasesEpinephrineVeratridineCatsTyramineReceptors, NicotinicCells, CulturedGuinea PigsTailHexamethoniumReserpineVasoactive Intestinal PeptideAdrenergic FibersBethanidineVas DeferensSecretory VesiclesDigitoninNeurons, EfferentElectrophysiologyNeuroeffector JunctionPara-Aortic BodiesAbducens Nerve DiseasesMecamylamineMembrane PotentialsPituitary Adenylate Cyclase-Activating PolypeptideReceptors, MuscarinicMethacholine Compoundsomega-Conotoxin GVIAChlorisondamineNeuropeptide YReflexNeurotransmitter AgentsErgotamineSubmandibular GlandParasympatholyticsHeart RateSynaptic TransmissionNeuropeptidesTetrodotoxinAction PotentialsSinoatrial NodeSweatingPhenoxybenzaminePhrenic NerveCholinergic FibersCalcium Channel BlockersEnkephalin, MethionineAdrenergic alpha-2 Receptor AntagonistsHypotension, OrthostaticSympatholyticsEfferent Pathways