Question

which of the following is not a physical barrier for immunity? a. saliva in the mouth b. hair cells in the ears c. acidic ph in the stomach d. oil gland secretions on the skin

Explanation:

Physical barriers for immunity are structures that physically prevent pathogens from entering the body. Saliva in the mouth, oil - gland secretions on the skin are physical barriers. The acidic pH in the stomach is a chemical barrier as it uses chemical substances (acids) to kill pathogens. Hair cells in the ears are for hearing and not related to immune physical barriers.

Answer:

b. hair cells in the ears