NURSING 101 Chapter 9: Alterations in Immunity and Inflammation

Hypersensitivity is best defined as a(an): a. Disturbance in the immunologic tolerance of self-antigens b. Immunologic reaction of one person to the tissue of another person c. Altered immunologic response to an antigen that results in disease d. Undetectable immune response in the presence of antigens ANS: C Hypersensitivity is an altered immunologic response to an antigen that results in disease or damage to the host. The other options are not accurate definitions of hypersensitivity. PTS: 1 REF: Page 262 2. A hypersensitivity reaction that produces an allergic response is called: a. Hemolytic shock c. Necrotizing vasculitis b. Anaphylaxis d. Systemic erythematosus ANS: B Examples of systemic anaphylaxis are allergic reactions to beestings, peanuts, and fish. The other options are not accurate examples of hypersensitivity. PTS: 1 REF: Page 263 3. The common hay fever allergy is expressed through a reaction that is mediated by which class of immunoglobulins? a. IgE c. IgM b. IgG d. T cells