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 (A)</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 (C)</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 (D)</p> Signup and view all the answers

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

<p>C3 (B)</p> Signup and view all the answers

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

<p>Alternative Pathway (B)</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 (C)</p> Signup and view all the answers

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

<p>5 (B)</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 (B)</p> Signup and view all the answers

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

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

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