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Which of the following is NOT a surface barrier serving as the first line of defense? 1) oil 2) keratin 3) antibody 4) mucus
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Which of the following is NOT a surface barrier serving as the first line of defense?

1) oil
2) keratin
3) antibody
4) mucus

User Dpellier
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8.1k points

1 Answer

1 vote

Final answer:

Antibody is NOT a surface barrier serving as the first line of defense.

Step-by-step explanation:

Among the options provided, antibody is NOT a surface barrier serving as the first line of defense. The first line of defense includes physical and chemical barriers that help prevent the entry of pathogens into the body. Antibodies are part of the adaptive immune system, which is activated upon encountering a specific pathogen and does not act as a surface barrier.

User Sul Aga
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