5 Classes of Antibodies Flashcards

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Questions and Answers

What are the five classes of antibodies?

  • IgA (correct)
  • IgE (correct)
  • IgD (correct)
  • IgG (correct)
  • IgM (correct)

Where is IgM located?

blood plasma

Where is IgA located?

blood plasma, milk, tears, saliva, mucus

Where is IgD located?

<p>protein in plasma membrane of B cells</p> Signup and view all the answers

Where is IgG located?

<p>blood plasma, crosses placenta</p> Signup and view all the answers

Where is IgE located?

<p>protein in plasma membrane of mast cells and basophils</p> Signup and view all the answers

What is the function of IgM?

<p>10% Ab - Anti A and Anti B, agglutination and complement fixation</p> Signup and view all the answers

What is the function of IgA?

<p>prevents pathogens from gathering to epithelium</p> Signup and view all the answers

What is the function of IgG?

<p>anti-D complement fixation</p> Signup and view all the answers

What is the function of IgE?

<p>stimulate to release histamine and heparin</p> Signup and view all the answers

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Study Notes

Classes of Antibodies

  • The five classes of antibodies are IgG, IgE, IgD, IgM, and IgA.

Location of Antibodies

  • IgM: Found in blood plasma.
  • IgA: Present in blood plasma, milk, tears, saliva, and mucus.
  • IgD: Located in the protein of the plasma membrane of B cells.
  • IgG: Found in blood plasma and can cross the placenta.
  • IgE: Located in the plasma membrane of mast cells and basophils.

Functions of Antibodies

  • IgM: Comprises 10% of antibodies; involved in agglutination and complement fixation, particularly anti-A and anti-B activities.
  • IgA: Functions to prevent pathogens from adhering to epithelial cells.
  • IgG: Plays a role in anti-D complement fixation.
  • IgE: Stimulates the release of histamine and heparin during allergic responses.

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