The Complement System - lecture
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Questions and Answers

What are the two main pathways that activate the complement system?

  • Classical and Alternative (correct)
  • Primary and Secondary
  • Red and Blue
  • Up and Down
  • Which molecule binds to the antibody attached to the antigen in the Classical Pathway?

  • C1 (correct)
  • C2
  • C3
  • C4
  • What does the bound protein act as in the Classical Pathway?

  • Enzyme (correct)
  • Antigen
  • Antibody
  • Pathogen
  • What is the Alternative Pathway activated by?

    <p>Exposure to particular carbohydrate chains present on the surfaces of pathogens</p> Signup and view all the answers

    What is the end result of both pathways?

    <p>Conversion of C3 to C3b and formation of MAC</p> Signup and view all the answers

    What is the function of the membrane attack complex (MAC)?

    <p>To destroy pathogens by creating holes in their cell membranes</p> Signup and view all the answers

    Which complement protein is converted to the active form in both pathways?

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

    Which pathway is activated by exposure to particular carbohydrate chains on pathogens?

    <p>Alternative Pathway</p> Signup and view all the answers

    What is the role of C1 in the Classical Pathway?

    <p>To bind to antibody molecule attached to antigen</p> Signup and view all the answers

    How many complement proteins join to form the membrane attack complex (MAC)?

    <p>5</p> Signup and view all the answers

    What is the function of the complement system?

    <p>To destroy pathogens by creating holes in their cell membranes</p> Signup and view all the answers

    Which pathway is activated by binding to antibody molecule attached to antigen?

    <p>Classical Pathway</p> Signup and view all the answers

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