Antibody

Definition

An antibody is a protein produced by the immune system that recognizes and binds to specific antigens, such as pathogens or foreign substances. They play a crucial role in identifying and neutralizing harmful agents in the body.

5 Must Know Facts For Your Next Test

1. Antibodies are produced by B cells, a type of white blood cell.
2. There are five main classes of antibodies: IgA, IgD, IgE, IgG, and IgM.
3. Each antibody has a unique binding site that matches a specific antigen.
4. The process of antibody production is part of the adaptive immune response, which provides long-term immunity.
5. Antibodies can neutralize pathogens directly or mark them for destruction by other immune cells.

Review Questions

• What type of cell produces antibodies?
• Name the five main classes of antibodies.
• How do antibodies neutralize pathogens?

Related terms

Antigen: A substance that induces an immune response, typically recognized as foreign by the body.

B Cell: A type of white blood cell responsible for producing antibodies.

Adaptive Immunity: The part of the immune system that adapts its response to specific pathogens for long-lasting protection.