A patient with hemophilia B is treated with factor IX replacement therapy. What is the primary mechanism by which this treatment exerts its therapeutic effect?

A Inhibition of factor Xa
B Activation of factor XI
C Replacement of deficient factor IX ✓
D Enhancement of fibrinolysis

Explanation

Factor IX replacement therapy works by replacing the deficient factor IX in patients with hemophilia B, allowing for the normal activation of factor X and the subsequent formation of a fibrin clot.

Source

Williams Hematology
Hematology Hematology: Coagulation Disorders Hematology: Coagulation Disorders Hard MEDICAL Confidence: high