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What is the first line of defense in the immune system?

Practice Questions

Q1
What is the first line of defense in the immune system?
  1. B cells
  2. T cells
  3. Physical barriers
  4. Cytokines

Questions & Step-by-Step Solutions

What is the first line of defense in the immune system?
  • Step 1: Understand that the immune system protects the body from harmful germs called pathogens.
  • Step 2: Identify what the first line of defense means; it refers to the body's initial protection against these pathogens.
  • Step 3: Recognize that physical barriers are the main components of this first line of defense.
  • Step 4: Learn that the skin acts as a protective barrier, preventing pathogens from entering the body.
  • Step 5: Know that mucous membranes, found in areas like the nose and mouth, also help trap and eliminate pathogens.
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