Question

Chemical released by blood platelets is

• A. Heparin
• B. Thromboplastin
• C. Fibrinogen
• D. Prothrombin

Answer 1

The correct option is B Thromboplastin

Thromboplastin is a plasma protein aiding 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 the blood platelets.
Heparin is released by the mast cells and blood basophils.
Fibrinogen is produced by the hepatic parenchymal cell. It is converted by thrombin into fibrin during the blood clot formation.
Prothrombin is stored in the parenchymal cells of the liver.
Therefore, the correct answer is option B.