it is known from studies previously conducted in this laboratory that an iv injection of ovine growth hormone ( gh , 100 micrograms/kg bw ) or an equimolar amount of somatostatin ( srif , 7.5 micrograms/kg bw ) , given to normal conscious dogs into a saphenous vein , leads to a significant increase in hepatic portal plasma serotonin and a simultaneous decrease in the concentrations of dopamine , norepinephrine and epinephrine .
C0028351
norepinephrine
C0014563
epinephrine