Agglutination refers to
Correct answer: D. the clumping of red blood cells when antibodies bind their antigens
- A. the bursting of white blood cells
- B. the formation of lymph
- C. a rise in platelet count
- D. the clumping of red blood cells when antibodies bind their antigens
Explanation
Cross linking by antibodies ties red cells into visible clumps, the reaction used to type blood groups. Clotted clumps can block vessels, which is why agglutination makes mismatched transfusion lethal.
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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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