Which term is the antigen-binding immunoglobulin produced by B cells that functions as the effector in an immune response?

Which term is the antigen-binding immunoglobulin produced by B cells that functions as the effector in an immune response?

• A. Stenting
• B. Aseptic Technique
• C. Bacteria
• D. Antibody

Answer: (D)

Antibodies are the antigen-binding immunoglobulins produced by B cells and act as the effector in the immune response. When B cells become plasma cells, they secrete antibodies that specifically recognize antigens. This binding can neutralize pathogens or toxins directly and also recruit other defenses—such as tagging invaders for phagocytosis (opsonization) or activating the complement system to help destroy the threat. The other terms don’t describe a molecule made by B cells that binds antigens: stenting is a procedure to keep vessels open, aseptic technique is about maintaining sterility, and bacteria are microorganisms, not antibodies. So the correct term is antibody.

Antibodies are the antigen-binding immunoglobulins produced by B cells and act as the effector in the immune response. When B cells become plasma cells, they secrete antibodies that specifically recognize antigens. This binding can neutralize pathogens or toxins directly and also recruit other defenses—such as tagging invaders for phagocytosis (opsonization) or activating the complement system to help destroy the threat. The other terms don’t describe a molecule made by B cells that binds antigens: stenting is a procedure to keep vessels open, aseptic technique is about maintaining sterility, and bacteria are microorganisms, not antibodies. So the correct term is antibody.