Prothrombin _______.
A) is manufactured in the liver with the help of vitamin B
B) is released by platelets
C) is converted to thrombin which converts fibrinogen to fibrin
D) forms a platelet plug when a blood vessel is cut

Question

Quizplus · Accepted Answer

Prothrombin is converted to thrombin, which in turn converts fibrinogen to fibrin during the process of blood clotting. Prothrombin is manufactured in the liver with the help of vitamin K. Platelets play a role in blood clotting, but they do not release prothrombin. Moreover, the formation of a platelet plug is the initial step in the process of blood clotting, but it does not involve prothrombin.