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Question

Thromboplastin required in blood clotting is secreted by

A
Monocytes
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B
Lymphocytes
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C
Erythrocytes
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D
Platelets
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Solution

The correct option is D Platelets
Thromboplastin is a protein secreted by platelets at the site of injury during wound. It converts plasma protein prothrombin into thrombin in the presence of calcium ions. In the presence of thrombin, fibrinogen gets converted into fibrin which leads to the formation of a clot forming a type of plug
So, the correct answer is 'Platelets'

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