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Animation: IgE Mediated (Type 1) Hypersensitivity (Quiz 2)
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View the animation below, then complete the quiz to test your knowledge of the concept.

1Arrange 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

2A 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.

3The inflammation response triggers all of the following EXCEPT
A)dilation of capillaries.
B)constriction of airways.
C)inhibition of mucus.

4A plasma cell is a mature T-helper cell that produces antibodies.

5Histamine is released from mast cells.

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