Thromboxane A2 causes: (A) Vasodilatation and platelet aggregaion, (B) Vasodilatation and anti platelet aggregatory, (C) Vasoconstriction and anti platelet aggregatory, (D) Vasoconstriction and platelet aggregaion
Answer is D. Thromboxane A2 secreted by platelets promotes platelet aggregation and vasoconstriction Ref: Ganong's Review of Medical Physiology Twenty-Third Edition Page No:563