Which of the following is NOT a surface barrier serving as the first line of defense?
A)mucus
B)keratin
C)oil
D)antibody

Name: Which of the following is NOT a surface barrier serving as the first line of defense? A)mucus B)keratin C)oil D)antibody
Brand: Quizplus
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Question

Quizplus · Accepted Answer

Antibodies are not a surface barrier, but rather are proteins produced by the immune system in response to a specific antigen. The other options - mucus, keratin, and oil - all act as physical barriers that help prevent the entry of pathogens into the body.

Which of the Following Is NOT a Surface Barrier Serving