since plasma catecholamines , adrenaline and noradrenaline were increased in smokers ( 3.95 +/- 0.7 vs 2.26 +/- 0.1 pmol/ml , p less than 0.05 ) at rest , the objective of an acute additional adrenergic discharge by physical exercise was to uncover possible tachyphylaxis .
C0014563
adrenaline
C0028351
noradrenaline