<prompt> In the intra-epithelial region of the mucosa of intestine the predominant cell population is that ofB cellT-cellsPlasma cellsBasophils  <response>: Ans. is b i.e., T-cellsAround 15 of the cells in the small intestinal epithelium are lymphocytes. These Intraepithelial lymphocytes IEL are viually all T lymphocytes but, unlike other T cells, most express the CD8 subset marker.The functions of this large populations of T cells are unknown. 