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Question

Which pair will be most important in initiating blood clotting?

A
Ca and prothrombin
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B
Prothrombin
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C
Thrombin and fibrinogen
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D
Prothrombin and fibrinogen
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Solution

The correct option is A Ca and prothrombin

In the presence of thromboplastin and calcium ion, prothrombin is converted to thrombin, which in turn converts fibrinogen to fibrin, resulting in coagulation of blood; a deficiency of prothrombin leads to impaired blood coagulation.


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