What describes a non-specific immune response?
Correct answer: C. Ingestion of a bacterial cell by a neutrophil
- A. Activation of killer T lymphocytes by infected cells
- B. Cloning of B lymphocytes to form plasma cells
- C. Ingestion of a bacterial cell by a neutrophil
- D. Presentation of antigen on the cell surface of macrophages
Explanation
c) Ingestion of a bacterial cell by a neutrophil:This option describes a non-specific immune response. Neutrophils are a type of white blood cell and part of the innate immune system. They are capable of engulfing and destroying pathogens, such as bacteria, through a process called phagocytosis. This is a non-specific response as neutrophils can target a wide range of pathogens without requiring prior exposure.
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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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