Understanding Immunoglobulins Quiz

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Questions and Answers

Which immunoglobulin is predominantly found in external secretions like tears and saliva?

IgG
IgM
IgD
IgA (correct)

During an infection, which immunoglobulin is produced first?

IgM (correct)
IgG
IgD
IgA

Which immunoglobulin crosses the placenta to provide passive immunity in newborns?

IgD
IgG (correct)
IgM
IgA

Which immunoglobulin is important in allergic reactions?

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

Which immunoglobulin serves as antigen-specific receptors on B lymphocytes?

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

Study Notes

Immunoglobulin Classes

IgG provides long-term immunity after vaccine or illness recovery and crosses the placenta to provide passive immunity in newborns
Found in blood and extracellular fluid, IgG also provides lymphatic immunity
IgA is present in external secretions such as tears and saliva, and is found in all mucous membranes
IgA provides passive immunity for breastfed infants
IgM is produced first during an infection, and IgG production follows afterwards
IgM is found in blood and lymph
IgD is an antigen-specific receptor on B lymphocytes
IgE is associated with mast cells or basophils and plays a key role in allergic reactions
Mast cells release histamine during allergic reactions

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Description

Test your knowledge on the different types of immunoglobulins (IgG, IgA, IgM, IgD, IgE) and their roles in the immune system. Learn about their functions in providing immunity after vaccination, across the placenta, in external secretions, and more.