Multiple Choice
Which of the following statements is true of anaphylactic shock?
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21. The Immune System
Introduction to the Immune System
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Which of the following is true about anaphylactic reactions?
A
They are primarily mediated by T cells.
B
They are a type of delayed hypersensitivity reaction.
C
They involve the rapid release of histamine and other mediators from mast cells.
D
They typically occur several days after exposure to an allergen.
Verified step by step guidance1
Understand that anaphylactic reactions are a type of hypersensitivity reaction, specifically Type I hypersensitivity.
Recognize that Type I hypersensitivity reactions are immediate and involve the immune system's response to an allergen.
Identify the key players in anaphylactic reactions: IgE antibodies, mast cells, and basophils.
Know that upon exposure to an allergen, IgE antibodies on the surface of mast cells and basophils trigger the release of histamine and other chemical mediators.
Conclude that anaphylactic reactions occur rapidly, often within minutes of exposure, and are not mediated by T cells or delayed in nature.
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