All of the following promote platelet aggregation except
Correct Answer: Prostacyclin
Description: Factors inhibiting platelet aggregation are ATP, PGI2 or prostacyclin, Aspirin, coisol Factors oring platelet aggregation are Thrombospondin which helps in fixation of platelet, platelet activating factor, ADP, Thromboxane A2, Ca2+,vWF etc. Plasmin also helps in platelet aggregation. Ref: Textbook of medical physiology by N Geetha, 2nd edition, page no.102,103
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