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What is an antigen?

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Question: What is an antigen?

Options:

  1. A type of antibody
  2. A foreign substance that induces an immune response
  3. A type of white blood cell
  4. A component of blood plasma

Correct Answer: A foreign substance that induces an immune response

Solution: 

An antigen is a foreign substance that induces an immune response in the body.

What is an antigen?

Practice Questions

Q1
What is an antigen?
  1. A type of antibody
  2. A foreign substance that induces an immune response
  3. A type of white blood cell
  4. A component of blood plasma

Questions & Step-by-Step Solutions

What is an antigen?
  • Step 1: Understand that the body has a defense system called the immune system.
  • Step 2: Know that the immune system protects the body from harmful things like germs and viruses.
  • Step 3: Learn that an antigen is something that the immune system recognizes as foreign or harmful.
  • Step 4: Realize that when the immune system detects an antigen, it triggers a response to fight it off.
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