Question

multiple choice question
factor ______ cross-links fibrin threads into a fibrin polymer.

○ xiii
○ viii
○ x

Explanation:

In the blood coagulation process, Factor XIII (also called fibrin - stabilizing factor) is responsible for cross - linking fibrin threads into a fibrin polymer. Factor VIII is involved in the intrinsic pathway of coagulation (acts as a cofactor), and Factor X is part of the common pathway of coagulation (converts prothrombin to thrombin). So the correct factor that cross - links fibrin threads into a fibrin polymer is Factor XIII.

Answer:

A. XIII