The human stomach is protected from self-digestion by a layer of
A B C D
bile. mucus. muscle. white blood cells.
Question: The human stomach is protected from self-digestion by a layer of
(A) bile.
(B) mucus.
(C) muscle.
(D) white blood cells.

Answer: (B) mucus.
Answer: (A) bile.
Question: The human stomach is protected from self-digestion by a layer of
(A) bile.
(B) mucus.
(C) muscle.
(D) white blood cells.
Answer: (B) mucus.