The immune cells that clean up pus as a part of the healing process is:
Correct answer: B. Macrophages
- A. Natural killer cell
- B. Macrophages
- C. Antibodies
- D. Neutrophils
Explanation
Neutrophils are the first responders - they rush to the infection site, attack bacteria, and die in large numbers.During healing, macrophages arrive after neutrophils and clean up the dead cells, bacteria, and debris - including pus (which is mostly dead neutrophils and tissue).They "eat up" the waste through phagocytosis, helping tissues heal properlyAntibodies are proteins that are produced by B lymphocytes in response to infection. They bind to specific antigens on the surface of pathogens, which helps to neutralize them and mark them for destruction by other immune cells.
This question appeared on the KMU MDCAT 2023 paper, which you can sit online with every answer explained.
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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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