Which statement describes innate immunity?

Which statement describes innate immunity?

• A. It requires lymphocytes only.
• B. It develops memory after exposure.
• C. It is non-specific with immediate response.
• D. It targets specific pathogens with antibodies.

Answer: (C)

Innate immunity is the body's immediate, non-specific defense against pathogens. It acts fast and broadly, using physical barriers (like skin and mucous membranes) and first responders such as neutrophils, macrophages, natural killer cells, and the complement system. It doesn’t tailor its attack to a particular microbe; instead it recognizes common features shared by many invaders. Because of that general approach, it lacks immunological memory—previous exposure doesn’t sharpen or speed up the response next time. In contrast, adaptive immunity uses lymphocytes (T and B cells) to mount targeted responses and to remember past infections, including the production of antibodies that recognize specific pathogens. Therefore, describing innate immunity as non-specific with an immediate response best captures its nature.

Innate immunity is the body's immediate, non-specific defense against pathogens. It acts fast and broadly, using physical barriers (like skin and mucous membranes) and first responders such as neutrophils, macrophages, natural killer cells, and the complement system. It doesn’t tailor its attack to a particular microbe; instead it recognizes common features shared by many invaders. Because of that general approach, it lacks immunological memory—previous exposure doesn’t sharpen or speed up the response next time. In contrast, adaptive immunity uses lymphocytes (T and B cells) to mount targeted responses and to remember past infections, including the production of antibodies that recognize specific pathogens. Therefore, describing innate immunity as non-specific with an immediate response best captures its nature.