The relationship between immunoglobulins and antibodies

Immunoglobulins and antibodies play crucial roles in the immune system. Immunoglobulins are extracellular plasma protein substances secreted by B cells, primarily involved in antibody secretion and delivery to the external environment. Antibodies are a class of small molecules in the immune system that specifically recognize and bind to foreign antigens, exhibiting specificity toward particular exogenous antigens. The presence of antibodies enables effective resistance against foreign invaders, thereby protecting the body's health. Thus, immunoglobulins and antibodies have a mutually dependent relationship: immunoglobulins activate antibodies, while antibodies in turn stimulate B cells to produce more immunoglobulins, creating a positive feedback loop.