Pathophysiology Module 6 Exam Questions and Correct Answers Already Passed

Pathophysiology Module 6 Exam Questions and Correct Answers Already Passed Which of the following hypersensitivity reactions involve the formation of antibodies against tissue-specific antigen? A. Type I B. Type II C. Type III D. Type IV - Answers Type II - involve the formation of antibodies that attack the body's own tissues Which of the following hypersensitivity reactions is mediated by Tc and Td cells? A. Type I B. Type II C. Type III D. Type IV - Answers Type IV - the only hypersensitivity responses mediated by T cells When a person has an allergic reaction to a bee sting, what kind of hypersensitivity response is occurring? A. Type I B. Type II C. Type III D. Type IV - Answers Type I - Typical allergic reactions Which of the following hypersensitivity reactions involves the formation of antigen-antibody (immune) complexes that get deposited in vessel walls or in extravascular tissue? A. Type I B. Type II C. Type III D. Type IV - Answers Type III A positive tuberculin skin test for detecting the presence of tuberculosis is indicative of which type of hypersensitivity reaction? A. Type I B. Type II C. Type III D. Type IV - Answers Type IV Which cells are stimulated by the presence of antibodies in a type I hypersensitivity reaction? A. Mast cells B. Macrophages C. B lymphocytes D. T lymphocytes - Answers Mast cells - because of presence of IgE Type I hypersensitivity is mediated by which of the following antibodies? A. IgG B. IgD C. IgM D. IgE - Answers IgE What is the effect of repeated exposure to an allergen in an atopic individual? A. The allergic response gets worse B. Antibody production is suppressed C. Antibody formation remains constant D. Tc cell activity increases significantly. - Answers A. The allergic response gets worse Which of the following clusters of symptoms would likely indicate the presence of atopic (allergic) disease from pollen exposure? A. Chest pain, shortness of breath, and abdominal cramping B. Weight loss, anxiety, and tremors C. Rhinorrhea, watery eyes, and headache D. Fatal diarrhea - Answers C. Rhinorrhea Which of the following receptors, when bound to histamine, stimulates gastric acid secretion in the stomach? A. H1 B. H2 C. H3 D. H4 - Answers B. H2 What is the effect of H1 receptors for histamine on smooth muscle tissue? A. Bronchodilation B. Endothelial cell retraction C. Prolonged vasoconstriction D. All of the above - Answers B. Endothelial cell retraction - Binding histamine to H1 receptors on endothelial cells results in increased capillary permeability from endothelial cell retraction The most severe type I hypersensitivity response is: A. Eczema B. Allergic rhinitis C. serous otitis