The body uses non-specific immune responses as the first line of defense when we are exposed to pathogenic or disease causing organisms. Which of the following factors is a nonspecific response? A. Antibodies are produced after an infection. B. Bacterial cell surface proteins start a response. C. Unbroken skin provides a physical barrier. D. Vaccine injections will imitate viral exposure.
llm
Answered on
C. Unbroken skin provides a physical barrier.
The body's most important nonspecific defense is the skin, which acts as a physical barrier to keep pathogens out. Even openings in the skin (such as the mouth and eyes) are protected by saliva, mucus, and tears, which contain an enzyme that breaks down bacterial cell walls.