it has been found that substance p and several other tachykinins , bradykinin , neurotensin , bombesin and acetylcholine relax the isolated artery only when the endothelium is present , while vip , isopropylnoradrenaline , adenosine , histamine , prostaglandins e1 and e2 , glucagon and insulin relax and angiotensin , vasopressin , oxytocin , 5-ht and noradrenaline contract the isolated vessel , no matter whether the endothelium is present or not .
C0038585
substance p
C0039241
tachykinins