Assertion: prostaglandin | /r/HasAspect | opposite effect
Facets:
value: to thromboxane
type: TRANSITIVE-OBJECT
Source sentences:
text: Another prostaglandin called prostacyclin has the opposite effect to thromboxane, reducing blood clotting and removing any clots that are no longer needed; it also causes the muscle in the blood vessel wall to relax, so that the vessel dilates.