PATHOLOGY

Detailed explanation-1: -Answer: The proteins that are produced in response to an antigen are called antibodies. It is a Y-shaped protein produced by white blood cells called B lymphocytes (or B cells) that the immune system uses to recognize and destroy foreign substances or pathogens, called antigens.

Detailed explanation-2: -In this manner, opsonins function as a bridge between the phagocyte and the particle to be ingested. Antibody (IgG) molecules and complement components are important opsonins that induce efficient phagocytosis, and their receptors have been studied extensively (Table 1).

Detailed explanation-3: -Facilitation of phagocytosis is calledopsonization, and IgG and C3b, in this role, are calledopsonins. As an opsonin, IgG expands the repertoire of the immune system by enabling phagocytes to recognize pathogens, such as viruses, that do not express any PAMPs.