Sodium oxalate prevents blood clotting due to

Blocking of fibrinogen transformation

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Covering RBC

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Inhibiting activity of clotting factor of plasma

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Combining with calcium ions of blood

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Solution

The correct option is A Combining with calcium ions of blood
Sodium oxalate, like citrates, can be used to remove calcium ions (Ca $^{2}$ $^{+}$ ) from blood plasma. It thus prevents blood from clotting. In the presence of calcium ions and other clotting factors, factor X activates an enzyme called prothrombin activator. This enzyme then converts the plasma protein prothrombin into thrombin. Thrombin is an enzyme that, in turn, converts fibrinogen to fibrin.

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Q. Which of the following statements are correct?

(i)

C a^{+ 2}

is necessary for blood coagulation.
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Fibrinogen is a clotting factor present in blood plasma. But our blood does not clot in the blood vessels. This is because of the anticoagulant present in the blood called_______

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