Define an antigen.
Correct answer: C. A foreign substance that produces an immune response
- A. A chemical that causes muscle hypertrophy
- B. A bacteria
- C. A foreign substance that produces an immune response
- D. A substance that causes a monocyte to transform into a macrophage
- E. A substance that agglutinates bacteria and marks them for phagocytosis
Explanation
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About Specific Defense Mechanism
Specific defense mechanisms provide targeted immunity through B lymphocytes, T lymphocytes, antibodies and memory cells that recognize particular antigens. Questions cover humoral and cell mediated responses, clonal selection, primary and secondary immune responses, vaccination and passive immunity, while distinguishing adaptive defenses from the immediate, non specific innate response.
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