All of the following are actions of Cytotoxic T-cells except: (A) They destroy translated & other foreingn cells, (B) They display the glycoprotein CDS, (C) They can phagocytose cells, (D) They act by using perforins and produce lymphotoxins
Answer is C. Phagocytosis is seen in humoral immunity mediated by circulating antibodies produced by B lymphocytes. Cytotoxic T cell destroy transplanted and other foreign cells, with their development, aided and directed by helper T Cell. Cytotoxic T cell displays CD8 and helper T cells display CD4. They kill organisms by inseing perforins into their cell membrane and thus producing holes. Ref: Ganong's Review of medical physiology, 24th edition.Pg no. 69 Textbook of medical physiology by N Geetha, 2nd edition, page no. 96,97