Question

q. the anticoagulant drug heparin exerts its effect by rapidly inactivating which of the following coagulation factors? (select all that apply)
description. sys2 blood obj5b
a: factor vii
b: factor viii
c: thrombin
d: factor x

Explanation:

Heparin acts as an anticoagulant by binding to antithrombin III. This binding causes a conformational change in antithrombin III, which then rapidly inactivates thrombin (Factor IIa) and Factor Xa. Factor VII is part of the extrinsic pathway and is not directly inactivated by heparin in the main anticoagulant mechanism. Factor VIII is part of the intrinsic pathway and is not the target of heparin's rapid - inactivation action in the primary anticoagulant effect.

Answer:

C. Thrombin, D. Factor X