the intravenous injection of ovine gh ( 100 micrograms/kg ) or equimolar amounts of srif ( 7.5 micrograms/kg ) produced in the hepatic portal circulation a transient but statistically significant rise of serotonin and a concomitant reduction in the concentration of dopamine , norepinephrine , and epinephrine .
C0028351
norepinephrine
C0014563
epinephrine