Platelate aggregation is caused by all, except -: (A) Thromboxane A2, (B) Serotonin, (C) Prostacyclin (PGI2), (D) Thrombin
Answer is C. Ans. is 'C' i.e.. Prostacyclin (PGI,) o Factors promoting platelet aggregation : ADP, TXA2 epinephrine, serotonin, vWF, fibrinogen, collagen, immune complex, thrombin, thrombospondin. a Factors inhibiting platelet aggregation : PGI2, NO, endothelin, bradykinin.