Prothrombin activator complex is made of: (A) Factor Xa, Va, VIIIa, (B) Factor Va, VIIa, Platelet Phospholipids, (C) Factor Xa, VIIIa, Tissue Phospholipids, (D) Factor Xa, Va, Platelet Phospholipids
Answer is D. Activated Factor X combines with Factor V and platelet or tissue phospholipids to form the complex called prothrombin activator. Reference: Guyton Physiology; 13th ed; Page: 488