Module 3

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Last updated: December 9, 2025

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Question	Answer
Which factor is activated first in the intrinsic pathway?	XII
Which vitamin is required for synthesis of clotting factors II, VII, IX, and X?	K
What enzyme breaks down fibrin during fibrinolysis?	Plasmin
Which anticoagulant enhances antithrombin III activity?	Heparin
What is the final stable clot made of?	Fibrin

Question	Answer
Which test monitors the extrinsic pathway?	PT
Which drug inhibits platelet COX-1?	Aspirin
Which factor activates prothrombin to thrombin?	Xa
What molecule does tPA convert into plasmin?	Plasminogen
What protein converts fibrinogen into fibrin?	Thrombin