Human Genetics: Concepts and Applications (Lewis), 9th Edition

Chapter 17: Genetics of Immunity

IgE Hypersensitivity

View the animation below, then complete the quiz to test your knowledge of the concept.



1.

Arrange the following events in the proper order in which they occur during an allergic response.
1 = Individual experiences symptoms
2 = Individual is sensitized to antigen
3 = IgE attaches to mast cells
4 = Antigen binds to IgE
A)1, 2, 3, 4
B)1, 3, 4, 2
C)2, 3, 1, 4
D)2, 3, 4, 1
E)2, 4, 3, 1
2.

A hypersensitivity reaction occurs
A)during the first exposure to an antigen.
B)during a second or subsequent exposure to an antigen.
C)in individuals with diseases of the immune system.
D)only in children.
E)only in individuals with asthma.
3.

The inflammation response triggers all of the following EXCEPT
A)dilation of capillaries.
B)constriction of airways.
C)inhibition of mucus.
D)pain.
E)itching.
4.

A plasma cell is a mature T-helper cell that produces antibodies.
A)True
B)False
5.

Histamine is released from mast cells.
A)True
B)False
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