Use the Information Below as Background for the Following Questions

Use the information below as background for the following questions.
Immunodeficiencies may be genetic in origin. Two examples of these are Bruton's agammaglobulinemia, an X-linked disorder, and DiGeorge syndrome, caused by a deletion from chromosome 22. Bruton's results in underdeveloped B cells, while DiGeorge syndrome results in a missing or seriously underdeveloped thymus.
-A patient undergoes a high level of mast cell degranulation, dilation of blood vessels, and acute drop in blood pressure. These symptoms could be caused by which of the following?

A) an autoimmune disease
B) a typical allergy that can be treated by antihistamines
C) an organ transplant, such as a skin graft
D) the effect of exhaustion on the immune system
E) anaphylactic shock immediately following exposure to an allergen

Correct Answer:

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