Immunoglobulins

Question 1

Protects the body through its presence in mucous membranes and skin; triggers allergic reactions and responds to parasites.

Answer 1

IgE

Question 2

Found in membranes of the respiratory and gastrointestinal tracts, tears, saliva, mucus, and colostrum; important in local immunity.

Answer 2

IgA

Question 3

Present in blood serum (in small amounts) and on B-cells surfaces; receptor for antigens; helps anchor cell memranes.

Answer 3

IgD

Question 4

Fights blood infections and triggers additional production of IgG; present in lymphocyte cells; first antibody made by a developing fetus.

Answer 4

IgM

Question 5

Main defense against bacteria; can cross the placenta to protect the fetus against infections (passive immunity).

Answer 5

IgG