Vasoconstricting mediator is -: (A) Prostacyclin, (B) Thromboxane-A2, (C) PGD2, (D) Lipoxins
Answer is B. Robbins basic pathology 9th edition page no 46, Thromboxane A2 is a potent vasoconstrictor Lipoxins are arachidonic acid metabolite which has anti-inflammatory action. PGF2a is a vasoconstrictor whereas PGD2 and PGE2 are vasodilators