This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Heart, Circulation, and Blood, Subject name: Physiology
Which of the following is not involved in intrinsic pathway 
Select and explain. 
A. Factor XII, B. Factor XI, C. Factor IX, D. Factor VII
D: Factor VII
Answer: D: Factor VII 
Explanation: Ans. (d) Factor VIIRef: Ganong, 25th ed/p.566Extrinsic pathway#Initiated by exposure to tissue thromboplastin (factor III) which activates factor VII