Transcytosis occurs in: (A) M cells of intestine, (B) Neuroglia, (C) Pneumocytes, (D) Axonlemma
Answer is A. In transcytosis, vesicles undergo Endocytosis on one side of a cell and then undergo exocytosis on the opposite side of the cell. Transcytosis is mostly seen in capillaries but also seen in M cells of intestine, osteoclasts,neurons (Ref: Ganong's Review of medical physiology)