The natural bacterial flora is beneficial to humans because they:
Correct answer: A. Interfere with pathogenic colonization
- A. Interfere with pathogenic colonization
- B. Develop resistance against antigens
- C. Develop resistance against physical agents
- D. Produce antibiotic against pathogens
Explanation
Bacterial flora is beneficial because it prevents colonisation by pathogens by competing for attachment & nutrients.
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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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