Organ rejection is caused by__________?
Correct answer: B. T-lymphocytes
- A. B-Lymphocytes
- B. T-lymphocytes
- C. Both B and T lymphocytes
- D. RBCs
Explanation
Organ rejection is primarily a cell-mediated immune response in which T lymphocytes recognize foreign major histocompatibility complex molecules and attack the transplanted tissue. B lymphocytes mainly produce antibodies, so students may choose both B and T lymphocytes by treating all immune cells as equally responsible for rejection.
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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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