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Manipal Medical Manipal Medical Solved Paper-2009

  • question_answer
    Which of the following prevents the conversion of prothrombin to thrombn in an undamaged bloodvessel?

    A)  Heparin         

    B)  Calcium ions

    C)  Thromboplastin  

    D)  Fibrinogen

    Correct Answer: A

    Solution :

     During blood clotting, prothrombin is converted into thrombin with the help of thrombokinase and calcium ions. Heparin is an anticoagulant, which prevents the conversion of prothrombin into thrombin.


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