Which of the following agents in not likely to be found in plasma ?
Correct answer: D. Thrombin
- A. Calcium ion
- B. Fibrinogen
- C. Prothrombin
- D. Thrombin
Explanation
Thrombin is the active enzyme formed during coagulation and is not normally present in circulating plasma. Plasma contains its inactive precursor, prothrombin, along with fibrinogen, calcium and other clotting factors.
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