Apoptosis and Its Significance · Zoology

How does apoptosis contribute to the immune system's function?

  1. By prompting B-cells to produce more circulating antibodies
  2. By eliminating self-reactive T-lymphocytes in the thymus
  3. By triggering systemic inflammation to recruit neutrophils
  4. By prolonging the lifespan of virus-infected host cells
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Correct answer: By eliminating self-reactive T-lymphocytes in the thymus

Negative selection in the thymus uses apoptosis to eliminate T-cells that recognize 'self' antigens. This process is critical for preventing autoimmune diseases and ensuring self-tolerance.

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