Which immune component is produced to fight disease?

Which immune component is produced to fight disease?

• A. Antibody
• B. Antigen
• C. White blood cell
• D. Cytokine

Answer: (A)

Antibody production is the body's targeted defense in humoral immunity. When a pathogen or toxin enters, B cells become plasma cells and secrete antibodies—specific proteins that circulate and bind to unique antigens on the invader. This binding can neutralize the pathogen directly, block its ability to infect cells, or mark it for attack by other immune components like phagocytes or the complement system. In short, antibodies are the crafted agents the body produces to fight disease. An antigen is the thing that triggers the response, not what the body produces. White blood cells are the broad group of immune cells that carry out defenses, but they aren’t the single product created to combat a specific invader. Cytokines are signaling molecules that coordinate the response, not the direct fighting agents themselves.

Antibody production is the body's targeted defense in humoral immunity. When a pathogen or toxin enters, B cells become plasma cells and secrete antibodies—specific proteins that circulate and bind to unique antigens on the invader. This binding can neutralize the pathogen directly, block its ability to infect cells, or mark it for attack by other immune components like phagocytes or the complement system. In short, antibodies are the crafted agents the body produces to fight disease.

An antigen is the thing that triggers the response, not what the body produces. White blood cells are the broad group of immune cells that carry out defenses, but they aren’t the single product created to combat a specific invader. Cytokines are signaling molecules that coordinate the response, not the direct fighting agents themselves.