Question
Biology Question on Immune System
To which type of barriers under innate immunity, do the saliva in the mouth and the tears from the eyes, belong?
A
Physical barriers
B
Cytokine barriers
C
Cellular barriers
D
Physiological barriers
Answer
Physiological barriers
Explanation
Solution
Acid in stomach, saliva in mouth, tears from eyes all prevent microbial growth. They are part of innate immunity and grouped under physiological barriers.