Which of the following causes vasoconstriction in all vascular beds: (A) PGE2, (B) PGF 2a, (C) PGI2, (D) TXA2
Answer is D. Answer- D. TXA2COX pathway is involved in the synthesis of prostaglandins and Thromoxane A2.Endothelium contains PGI2 synthase and thus forms PGI2Platelets contain TXA2 synthase and therefore synthesize TXA2Blood vessels- Thromboxane A2 (TXA2)