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Question

When body tissues are injured resulting in the loss of blood, the process of blood clott begins and the blood platelets release

A
Prothrombin
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B
Thrombin
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C
Fibrinogen
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D
Thromboplastin
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Solution

The correct option is D Thromboplastin
During an injury, the blood platelets release thromboplastin which converts plasma protein prothrombin into thrombin in the presence of calcium ions. Thrombin then converts soluble plasma protein fibrinogen into fibrin which forms a meshwork by trapping red blood cells, thus forming a clot.
Thus, the correct answer is option D.

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