Question

Thromboplastin is secreted by

• A. Platelets
• B. Lymphokines
• C. Helper T cells
• D. Mast cells

Answer 1

The correct option is A Platelets

Thromboplastin is secreted by the platelets. It is a plasma protein which aids in blood coagulation through catalyzing the conversion of prothrombin to thrombin. It is a complex enzyme, that is found in brain, lung, and other tissues and especially in blood platelets and that functions in the conversion of prothrombin to thrombin in the clotting of blood. It is also called thrombokinase.