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Question

Which one acts as physiological barrier to entry of microorganisms in human body

A
Monocytes
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B
Skin
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C
Epithelium of urinogenital tract
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D
Tears
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Solution

The correct option is C Tears
  • Physiological barriers to the entry of microorganisms in the human body are tears in eyes, saliva in mouth and HCl in the stomach.
  • The enzymes lysozymes are found in tears and saliva inhibits the synthesis of peptidoglycan present in the cell wall of microorganisms especially eubacteria.
  • Hence Tears acts as the physiological barrier to entry of microorganisms in the human body.
  • So, the correct answer is 'Tears'.

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