The Complement System Quiz
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Questions and Answers

Which pathway of complement activation is triggered by binding of C1 to antibody (IgM or IgG) that has combined with antigen?

  • Classical pathway (correct)
  • Alternative pathway
  • Lectin pathway
  • None of the above
  • Which complement pathway is triggered by microbial surface molecules, polysaccharides, and cobra venom in the absence of antibody?

  • Classical pathway
  • Alternative pathway (correct)
  • Lectin pathway
  • None of the above
  • Which plasma protein binds to carbohydrates on microbes and directly activates C1 in the lectin pathway?

  • C6
  • C3
  • Mannose-binding lectin (correct)
  • C5
  • Which complement product is responsible for increased vascular permeability, chemotaxis, opsonization, and proteolysis of C3?

    <p>C3</p> Signup and view all the answers

    Which component is critical in complement activation and is the most abundant component of complement products?

    <p>C3</p> Signup and view all the answers

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