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Physiology Blood: Hemostasis and Blood Coagulation 33b226b1

Platelate aggregation is caused by all, except -

A
Thromboxane A2
B
Serotonin
C
Prostacyclin (PGI2)
D
Thrombin
High-Yield Explanation
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.

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