Pathology All of the following are true about blood coagulation, EXCEPT: A Factor X is pa of both intrinsic and extrinsic pathways B Extrinsic pathway is activated by contact with negatively charged surfaces C Intrinsic pathway can be activated in vitro D Calcium is required in several steps of coagulation 💡 Explanation All of the following are true about blood coagulation, EXCEPT: ✓ Correct Answer: B. Extrinsic pathway is activated by contact with negatively charged surfaces