According to the clonal selection theory, an antigen
Correct answer: C. selects and stimulates the lymphocyte clone bearing the matching receptor
- A. creates antibodies from scratch
- B. converts T cells into B cells
- C. selects and stimulates the lymphocyte clone bearing the matching receptor
- D. suppresses every lymphocyte equally
Explanation
The body already holds millions of lymphocyte clones, each with one receptor; the antigen simply picks the matching one and drives its expansion. Selection, not instruction, is the theory's key word.
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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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