CatecholaminesPheochromocytomaUrineEpinephrineNorepinephrineAdrenal MedullaReceptors, CatecholamineChromaffin CellsDopamine beta-HydroxylaseChromaffin SystemAdrenal GlandsVanilmandelic AcidNormetanephrineDopamineTyrosine 3-MonooxygenaseChromaffin GranulesMetanephrineAdrenal Gland NeoplasmsReserpinePropranololIsoproterenolReceptors, AdrenergicSplanchnic NervesChromogranin AUrinalysisDihydroxyphenylalanineCatecholamine Plasma Membrane Transport ProteinsPhenylethanolamine N-MethyltransferaseMethyltyrosinesPhentolaminealpha-MethyltyrosineChromograninsSympathetic Nervous SystemUrine Specimen CollectionReceptors, Adrenergic, betaTyramineHeart RateCattlePhenoxybenzamineHydroxydopaminesChromatography, High Pressure Liquid