Chapter 4 Immunity

Question 21

During flu season, you get exposed to the influenza virus. Which component of your immune system will be the first to respond to this foreign pathogen?

a. Innate
b. Adaptive
c. Humoral
d. T cell mediated

Answer 21

a. Innate

Question 22

The following season, you are concerned about getting the flu again. Which of the following statements is true?

a. You continue to be at risk because nothing can protect you from reinfection.
b. Vaccination for prevalent strains of influenza virus can provide improved protection against the disease.
c. Premedication with immunosuppressants will provide protection against infection.
d. Because you have had the flu once, you will be protected from getting it again.

Answer 22

b. Vaccination for prevalent strains of influenza virus can provide improved protection against the disease.

Question 23

Immune suppression in AIDS is related to:

a. decreased platelet count.
b. decreased red blood cell count.
c. decreased lymphocyte count.
d. elevated lymphocyte count.

Answer 23

c. decreased lymphocyte count.

Question 24

Which of the following conditions represents pathologic responses caused by immunologic memory? a. Common cold b. Anaphylaxis c. Shingles d. Strep throat

Answer 24

b. Anaphylaxis

Question 25

The pathology related to systemic lupus erythematosus is due to: a. neutrophil activation. b. delayed immunity. c. immunosuppression. d. immune complex deposition.

Answer 25

d. immune complex deposition.

Question 26

Immunodeficiency is the result of: a. failure of host defense mechanisms. b. hypersensitive immune responses. c. inappropriate immune response to self. d. immune response stimulated by antigens from other individuals.

Answer 26

a. failure of host defense mechanisms.

Question 27

A hypersensitivity reaction resulting from a yellow jacket sting is an example of: a. type I, immediate hypersensitivity reaction. b. type II, antibody-mediated reaction. c. type III, immune complex reaction. d. type IV, cell-mediated reaction.

Answer 27

a. type I, immediate hypersensitivity reaction.

Question 28

A hypersensitivity reaction resulting from complement activation due to insoluble antigen–antibody deposition is an example of: a. type I, immediate hypersensitivity reaction. b. type II, antibody-mediated reaction. c. type III, immune complex reaction. d. type IV, cell-mediated reaction.

Answer 28

c. type III, immune complex reaction.

Question 29

Autoimmunity may be triggered by which one of the following? a. Elimination of self-reactive lymphocytes in central lymphoid tissues b. Persistent lymphocyte ignorance c. Impaired T cell activation d. Close resemblance between foreign and self-antigen

Answer 29

d. Close resemblance between foreign and self-antigen

Question 30

Treatment of an altered immune response with corticosteroids is associated with which one of the following adverse effects? a. Decreased blood sugar b. Loss of bone mineral c. Thickening of skin d. Weight loss

Answer 30

b. Loss of bone mineral

Question 31

The transfer of secretory IgA from mother to infant during breast-feeding is an example of: a. a hypersensitivity reaction. b. active immunity. c. passive immunity. d. alloimmunity.

Answer 31

c. passive immunity.

Question 32

Which of the following is true regarding cytotoxic T lymphocytes? a. They recognize the MHC class I–antigen complex. b. They recognize the MHC class II–antigen complex. c. They carry the CD4 marker. d. They present antigen to B lymphocytes for antibody production.

Answer 32

a. They recognize the MHC class I–antigen complex.

Question 33

Which of the following are considered antigen-presenting cells? a. Dendritic cells b. Eosinophils c. B lymphocytes d. T lymphocytes

Answer 33

a. Dendritic cells

Question 34

Which of the following markers identifies a nucleated body cell? a. CD4 b. BCR c. MHC I d. MHC II

Answer 34

c. MHC I

Question 35

Which of the following is true regarding pharmacologic treatment for AIDS? a. Drugs are used to target increased red blood cell number. b. Drugs are used to target increased white blood cell number. c. Drugs are used to increase host DNA replication. d. Drugs are used to inhibit HIV replication.

Answer 35

c. Drugs are used to increase host DNA replication.