Hemophilia Is a Disorder in Which Bleeding Is Severe and Prolonged

Multiple Choice

Hemophilia is a disorder in which bleeding is severe and prolonged due to a lack of clotting factor VIII. The factor activation cascade is interrupted at the Factor IX activation step. Which pathway is inhibited by this interruption?

A) The extrinsic clotting mechanism
B) The Hageman mechanism
C) The prothrombin clotting mechanism
D) The intrinsic clotting mechanism