stimulation of peptide secretion caused by low concentrations ( 10 ( -8 ) m ) , of adrenaline ( ad ) and noradrenaline ( na ) changed to inhibition at high concentrations ( 10 ( -5 ) m ) whereas intermediate concentrations ( 10 ( -6 ) , 10 ( -7 ) m ) possessed both inhibitory and excitatory effects .
C0014563
adrenaline
C0028351
noradrenaline