after perfusing the vascular circuit of the mesenteric artery of the rat with a ca-free solution for 20 min , extracellular ca was depleted , and the vasoconstrictor effect of high k solutions was abolished , while the vasopressin response was reduced by 40 % , serotonin by 30 % and noradrenaline and adrenaline responses by about 20 % .
C0028351
noradrenaline
C0014563
adrenaline