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Question Bank [2022] — BIOLOGY STD 12 Science — Question

Maharashtra BoardEnglish MediumSTD 12 ScienceBIOLOGYQuestion Bank [2022]3 Marks
Question
Explain the importance of epithelial surface in innate immunity.
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Answer

Epithelial surface:

The intact skin and mucous membranes (secrete mucous) covering the body, protects against invasion by microorganism(s).

  1. The healthy skin possesses bactericidal activity due to the presence of high concentrations of salt in drying sweat.
  2. Sebaceous secretions and long chain of fatty acids have bactericidal and fungicidal properties.
  3. The mucosa of the respiratory tract has several innate mechanisms of defense.

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