Question

what is the function of mucus in the stomach?
emulsifies fats
digests proteins
protects stomach cells from gastric acid
all of the above

Explanation:

Stomach mucus forms a protective barrier. Gastric acid is highly acidic, and mucus prevents it from damaging stomach cells. Emulsifying fats is done by bile, digesting proteins by pepsin.

Answer:

C. Protects stomach cells from gastric acid