This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T, Subject name: Anatomy
Function of hepatic kupffer cells is 
Select and explain. 
A. Formation of sinusoids, B. Vitamin A storage, C. Increase blood perfusion, D. Phagocytosis
D: Phagocytosis
Answer: D: Phagocytosis 
Explanation: Kupffer cells Kupffer cells, derived from the macrophage - monocyte system Are irregular stellate - shaped cells that also line the sinusoids, insinuating between endothelial cells Phagocytic, play a major role in the trapping of foreign substances and initiating an inflammatory response MHC-II antigens are expressed on kupffer cells but do not confer efficient antigen presentation compared with macrophages elsewhere in the body Ref: Sabiston 20th edition Pgno :1430