What is the primary function of the protein antithrombin in the coagulation cascade?

A To activate factor X
B To inhibit thrombin and other coagulation factors ✓
C To stimulate platelet aggregation
D To enhance fibrinolysis

Explanation

Antithrombin is a naturally occurring inhibitor of thrombin and other coagulation factors, playing a crucial role in regulating the coagulation cascade.

Mnemonic

Antithrombin = Anti-thrombosis

Source

Guyton and Hall Textbook of Medical Physiology
Hematology Hematology: Coagulation Disorders Hematology: Coagulation Disorders Medium MEDICAL Confidence: high