What is the main purpose of an antigen-antibody reaction?

The main purpose of an antigen-antibody reaction is indeed to label and destroy potentially dangerous antigens. When an antigen enters the body, it is recognized as foreign by the immune system. Antibodies produced by B cells specifically bind to these antigens. This binding serves multiple functions, including neutralization of pathogens, opsonization (which enhances phagocytosis), and activation of the complement system, leading to the destruction of pathogens.

Furthermore, the formation of immune complexes, where antibodies bind to their respective antigens, is crucial. These complexes can then be cleared from the bloodstream by immune cells such as macrophages and neutrophils, promoting the overall function of the immune system and ensuring that harmful substances do not proliferate within the body.

While neutralizing toxins and creating memory cells are important functions of the immune system, and hormone stimulation is related to other physiological processes, the primary function of the antigen-antibody interaction focuses on the identification and elimination of antigens, thus maintaining the body's defense mechanisms.