A patient has been admitted with pernicious anemia and has asked the nurse to tell him what type of disorder pernicious anemia is. The nurse tells him that it is an immune disorder that results from failures of the tolerance to one's "self." Responding immunologically to one's own antigens is called a(n)

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Autoimmune disorders are failures of the tolerance to "self." Autoimmune disorders may be described as an immune attack on the self and result from the failure to distinguish "self" protein from "foreign" protein.

A Patient Has Been Admitted with Pernicious Anemia and Has