This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
[{'content': 'Paial thromboplastin time correlates with \nSelect and explain. \nA. Intrinsic and common pathway, B. Extrinsic and common pathway, C. Fibrinogen level, D. Function of platelets', 'role': 'user'}, {'content': 'Answer: D \nExplanation: ref Robbins 8/e p120,666 ,;7/e p 69;9/e p80 Shoened APTT demonstrates hypercoagulation and high MOPEG levels indicate increased catecholamine metabolism. A direct correlation between APTT and MOPEG was found herein, demonstrating a link between catecholamines and the process of coagulation. Catecholamines may interact with the a2-adrenergic receptors located on platelets and conve factor XII to XIIa or through the kallikrein-kinin system, they may activate factor XII. The activation of factor XII initiates the intrinsic coagulation pathway, which is monitored by APTT. It is suggested to control patients with a shoened APTT and increased sympathetic activity with the aim of preventing secondary coagulation and cardiovascular accidents by administering anti-thrombotic and anti-adrenergic agents It correlates with clotting factor 12 and function of platelet', 'role': 'assistant'}]