Multiple Choice
Which of the following would be an example of a specific line of defense against an infectious agent?
A) The skin acts as a barrier to infection by the agent.
B) Macrophages engulf the invading agent in the affected tissue.
C) Mucus membranes in the lungs trap the invading pathogens.
D) B cells stick to the invading pathogen's surface.
Correct Answer:
Verified
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