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  • Which of the following is not a physiological barrier of ...
Multiple choice

Which of the following is not a physiological barrier of innate immunity?

  1. Acid in the stomach

  2. Saliva in the mouth

  3. Tears in the eye

  4. Mucus in the respiratory tract

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Mucus in the respiratory tract is a physical barrier of innate immunity.

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