Which of the following is NOT a required factor in the intrinsic clotting mechanism
A)calcium ion
B)factor XII
C)platelet factor 3
D)factor VII

Question

Quizplus · Accepted Answer

Factor VII is part of the extrinsic clotting mechanism, not the intrinsic clotting mechanism. The intrinsic pathway is activated by trauma inside the vascular system, and is activated by platelets. Factor VII, however, is involved in the extrinsic pathway, which is activated by external trauma that causes blood to escape from the vascular system.

Which of the Following Is NOT a Required Factor in the Intrinsic