Which of the following is a pivotal molecule associated with the external surfaces of aggregated platelets and is involved in the intrinsic and extrinsic mechanisms of blood clotting?

Question

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PF3 (Platelet factor 3) is a pivotal molecule associated with the external surfaces of aggregated platelets and is involved in the intrinsic and extrinsic mechanisms of blood clotting. Thromboplastin prothrombin activator (choice B) and thrombin (choice C) are also involved in blood clotting, but they are not directly associated with external surfaces of aggregated platelets. PGI2 (choice D) is a prostaglandin that inhibits platelet aggregation and blood clotting.

Which of the Following Is a Pivotal Molecule Associated with the External