arterial plasma dopa ( 1,043 +/- 129 pg/ml ) and epinephrine ( 218 +/- 96 pg/ml ) were consistently higher than venous levels of dopa ( 591 +/- 80 ) and epinephrine ( 54 +/- 16 pg/ml ) , showing extraction of these by the kidney , whereas arterial plasma norepinephrine ( 329 +/- 89 pg/ml ) and dopamine ( 64 +/- 9 pg/ml ) were lower than the venous levels of norepinephrine ( 695 +/- 161 pg/ml ) and dopamine ( 239 +/- 45 pg/ml ) , indicating secretion of these catecholamines into the circulation .
C0014563
epinephrine
C0028351
norepinephrine