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The Immune System

To which type...

Question

To which type of barrier under innate immunity do saliva in mouth and tears from eyes belong?

A

Physical barriers

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B

Cellular barriers

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C

Cytokine barriers

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D

Physiological barriers

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Solution

The correct option is D Physiological barriers
Physiological barriers mainly include body fluids that prevent microbial growth such as saliva in the mouth. The enzyme, lysozyme present in perspiration, saliva and tears kills many bacteria by destroying their cell walls.

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The Immune System

Standard XII Biology

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