<prompt> Antigen presentating cells are which of the followingAstrocytesEndothelial cellsEpithelial cellsLangerhans cells  <response>: Ref Robbins 9e p195 epithelial and Langerhans cells is also the answer Professional antigen presenting cellsAPCs are immune cells that specialize in presentingan antigen to a T-cell. The main types of professional APCs are dendritic cells DC, macrophages, and Bcells Other APC are endothelial cells, Langerhans cells, epithelial cells 