Which one of the following proteins takes part in blood clotting
Correct answer: E. Both A and B
- A. Prothrombin
- B. Fibrinogen
- C. Immunoglobulin
- D. Globulin
- E. Both A and B
Explanation
Prothrombin is a protein made by the liver. Prothrombin helps blood to clot. The "prothrombin time" (PT) is one way of measuring how long it takes blood to form a clot, and it is measured in seconds (such as 13.2 seconds). A normal PT indicates that a normal amount of blood-clotting protein is available.Fibrinogen is a protein produced by the liver. This protein helps stop bleeding by helping blood clots to form. When blood clotting is activated, fibrinogen circulating in the blood is converted to fibrin which in turn helps in forming a stable clot at the site of vascular disruption.
This question appeared on the UHS MDCAT 2014 paper, which you can sit online with every answer explained.
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