Coagulation pathway – MCQ

All are true about coagulation pathway except?
A. Intrinsic pathway can be activated in vitro
B. Calcium is necessary for several steps of coagulation pathway
C. Factor X is important in both extrinsic and intrinsic pathway
D. Extrinsic pathway activation is via contact negatively charged surfaces

Correct answer : D. Extrinsic pathway activation is via contact negatively charged surfaces

• Extrinsic pathway is activated by exposure to tissue factor
• Intrinsic pathway is activated by contact with negatively charged surfaces