This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Heart, Circulation, and Blood, Subject name: Physiology
[{'content': 'All of the following proteins are synthesized by the liver EXCEPT: \nSelect and explain. \nA. Haptoglobin, B. Antithrombin-III, C. Von wilebrand factor, D. Hemopexin', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. C Von Wilebrand factorRef: Ganongy 25th ed. pg. 563Von wilebrand factor is synthesized by endothelial cells.HaptoglobinBinds and transports free hemoglobin in blood released after intravascular hemolysisAnti-thrombin IIIProtease inhibitor of intrinsic coagulation systemHemopexinBinds to porphyrins particularly for heme recycling.', 'role': 'assistant'}]