The Basic Event in the Formation of a Blood Clot

Question

The basic event in the formation of a blood clot is the change of
A) fibrinogen to fibrin.
B) fibrin to fibrinogen.
C) thrombin to prothrombin.
D) vitamin K to prothrombin.
E) red blood cells to platelets.

Accepted Answer

The basic event in the formation of a blood clot is the conversion of soluble fibrinogen to insoluble fibrin by the enzyme thrombin, which is formed from prothrombin. This process is known as coagulation or clotting. Thus, choice A, fibrinogen to fibrin, is the best choice. Choices B, C, D, and E are incorrect as they do not accurately describe the basic event in blood clot formation.