This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pharmacology
Which of the following is inhibited by Aspirin: September 2010 
Select and explain. 
A. Cyclo oxygenase, B. Lipo oxygenase, C. Phospholipase, D. None of the above
A: Cyclo oxygenase
Answer: A: Cyclo oxygenase 
Explanation: Ans. A: Cyclo Oxygenase Aspirin also has an antiplatelet effect by inhibiting the production of thromboxane by inhibiting coxl and tx-synthetase, which under normal circumstances binds platelet molecules together to create a patch over damage of the walls within blood vessels. Because the platelet patch can become too large and also block blood flow, locally and downstream, aspirin is also used long-term, at low doses, to help prevent hea attacks, strokes, and blood clot formation in people at high risk for developing blood clots