Each of the Following is a Physical Barrier to Infection

Question

Each of the following is a physical barrier to infection except
A) body hair.
B) epithelium.
C) secretions.
D) complement.
E) basement membranes.

Accepted Answer

Complement is not a physical barrier to infection, but rather a part of the immune response. Body hair, epithelium, secretions, and basement membranes are all physical barriers that prevent pathogens from entering the body or spreading within it.