NEET 2011 Biology question

Which one of the following acts as a physiological barrier to the entry of microorganisms in human body ?

(1)Epithelium of urogenital tract
(2)TearsCorrect
(3)Monocytes
(4)Skin

Answer: (2)

Solution

Innate immunity has four types of barriers: physical (skin, mucus-lined epithelia of respiratory, gastrointestinal and urogenital tracts), physiological (gastric HCl, saliva, tears), cellular (neutrophils,

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Question ID VK-090891