Pathology All of the following are true about blood coagulation, except A Factor X is part of both intristic and extrinsic path ways B Extrinsic pathway is activatied 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 activatied by contact with negatively charged surfaces