Which of the following is not a chemical barrier?
A) mucous membrane
B) saliva
C) gastric juice
D) complement

Question

Quizplus · Accepted Answer

Mucous membrane, saliva, and gastric juice are all chemical barriers that help protect against infection. Complement, on the other hand, is a group of proteins that work with the immune system to enhance the ability of antibodies and phagocytic cells to destroy pathogens. While it is involved in the body's defense against infection, it is not a chemical barrier in the sense that it doesn't directly prevent the entry or spread of pathogens.

Which of the Following Is Not a Chemical Barrier