Multiple choice

Which is the anti-coagulant substance in blood?

  1. Fibrinogen

  2. Heparin

  3. Thrombin

  4. Globin
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Heparin is a naturally occurring anticoagulant produced by mast cells and basophils. It prevents blood clot formation by enhancing the activity of antithrombin III, which inhibits thrombin and other clotting factors. Fibrinogen and thrombin are actually pro-coagulant substances involved in clot formation, while globin is a protein component of hemoglobin.

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