Antibodies acting predominantly on the mucosal cells belong to -: (A) IgG class, (B) IgM class, (C) IgE class, (D) IgA class
Answer is D. - IgA is selectivity concentrated in secretions and on mucus surfaces forming an antibody paste and is believed to play an impoant role in local immunity against respiratory and intestinal pathogens. - inhibits the adherence of micro organisms to the surface of mucosal cells by covering the organisms and thereby preventing their entry into body tissues. Reference : Anathanarayan & paniker's 9th edition, pg no: 97 <\p>