Question

Which of the following does not act as a protecting barrier for the body surface?.
(a) skin
(b) mucus
(c) Gastric acid
(d) Salivary amylase

Answer 1

Answer:

i think it is skin

Explanation:

hope it helps u

Answer 2

Answer:

Salivary amylase.

here the correct answer

I think it is helpful to you..✌