All of the following protect the skin and mucous membranes from infection EXCEPT
A) HCl.
B) the "ciliary escalator."
C) tears.
D) saliva.
E) multiple layers of cells.

Question

Quizplus · Accepted Answer

HCl is a strong acid produced by the stomach to digest food and does not protect the skin or mucous membranes from infection. The other options listed, including the multiple layers of cells in the skin and mucous membranes, the ciliary escalator that moves debris out of the respiratory tract, tears that contain lysozyme to break down bacterial cell walls, and saliva that contains antimicrobial enzymes, all help to protect against infection.

All of the Following Protect the Skin and Mucous Membranes