Type of immunoglobulin with the highest response in response to subsequent exposure to an antigen; only immunoglobulin that passes the placental barrier

Type of antibodies present in blood, mucus, and human milk secretions; play an important role against viral and respiratory pathogens.

Type of immunoglobulins responsible for hypersensitivity and allergic response; cause mast cells to release histamine; protection from parasites

A specific immune response concerned with immune responses outside of the cell; involves B lymphocytes that differentiate into plasma cells and secrete antibodies.

The process of binding serum complement to the product formed by the union of an antibody and the antigen for which it is specific occurs when complement is added to a mixture (in proper proportion) of such an antibody and antigen.

Immunoassay that uses radiolabeled molecules in a stepwise formation of immune complexes; very sensitive in vitro assay technique used to measure concentrations of substances, usually measuring antigen concentrations by use of antibodies.

Formation of clumps of cells or inert particles by specific antibodies to surface antigenic components.

Process of transforming a dissolved substance into an insoluble solid from a super-saturated solution.

The following are cells in the blood that ingest and destroy microbes and part of the reticuloendothelial system, except:

Non-specific immune response as an internal antimicrobial agent as a substance produced within the cells in response to a viral attack.

Type of immunity that uses vaccine or toxoid to stimulate the formation of homologous antibodies.

Type of immunity in which passage of preformed antibodies from the mother through the placenta to the fetus or colostrum to the neonate.

Type of immunity with an injection of antisera derived from immunized animals or humans; provide immediate protection, and also are of value in treatment.

Type of immunity in which antibodies formed by the individual during the course of the disease; may provide lifelong immunity.