the coexistence of vip and catecholamines in frog chromaffin granules and the stimulatory effect exerted by vip on corticosteroidogenesis suggest that , in these animals , vip may be co-liberated with noradrenaline during stress conditions , and thus may act locally on adrenocortical cells to stimulate corticosteroid secretion .
C0007412
catecholamines
C0028351
noradrenaline