Q177 / 180 · AIIMS 2007 · Zoology

The component of blood which prevents its coagulation in the blood vessels is

  • A
    haemoglobin
  • B
    plasma
  • C
    thrombin
  • Correct answer
    D
    heparin.

Solution

Heparin prevents blood coagulation in the blood vessels. It is secreted by mast cells. It is an anticoagulant, blocking conversion of prothrombin to thrombin. Haemoglobin is the blood pigment necessary for oxygen transport. Plasma is the component of blood. Thrombin is the product of blood clotting.

Hence, the correct answer is option: 'D'.

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