Function of IgA is -
Ans. is 'a' i.e., Acts as a mucosal barrier for infection Secretory IgA is selectively 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.
Acts as a mucosal barrier for infection
Circulating antibody
Kills virus infected cells
Activates macrophages