Solution-Exaggerated response of the immune system | Homework Helpers

1. The lymphatic system differs from the cardiovascular system in that

a. lymph capillaries do not contain any fluid.
b. lymph circulates fluids and cardiovascular does not
c. the lymphatic system only carries fluid away from tissues.
d. the lymphatic vessels have their own “pump” to assist flow.
e. lymph capillaries allow free movement of fluid in and out of the capillaries.

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2. The palatine tonsils

a. are located in the nasopharynx.
b. interfere with breathing when enlarged.
c. are located superior to the palate.
d. are really lymph nodes in disguise.
e. are located at the junction of the oral cavity and pharynx.

3. Which of the following would be classified as an innate mechanical mechanism?

a. inflammation
b. release of histamine
c. activation of complement
d. phagocytosis of invading organisms
e. washing action of tears and saliva

4. Which of the following is usually the first cell type to leave the blood and enter infected tissues?

a. eosinophil
b. neutrophil
c. lymphocyte
d. monocyte
e. natural killer cell

5. Transplanted tissues and organs that contain _________ _________ are rejected by the body.

a. self antigens
b. foreign antigens
c. foreign antibodies
d. auto antigens
e. plasma proteins

6. The MHC class I antigen complex displays a foreign antigen on the cell surface. This prompts the immune system to destroy

a. the displaying cell.
b. the virus inside the cell, but not the cell.
c. extracellular antigens.
d. mature red blood cells.
e. B cell clones.

7. Once cytotoxic T cells are produced, which of the following is (are) consistent with their ability to attack intracellular viruses?

a. Most nucleated cells process antigens through the MHC class I mechanisms.
b. Viral antigens are processed by the MHC class I mechanism and are presented to the cell surface.
c. Cytotoxic T cells bind to MHC class I processed antigens.
d. Cytotoxic T cells bound to the MHC class I processed antigens release lymphokines.
e. All of these choices are correct.

8. Cytotoxic T cells

a. produce antibodies for general circulation.
b. are destroyed after contact killing.
c. cause precipitation of antigens.
d. have IgG antibodies on their cell membranes.
e. attach to the surface of cells causing them to lyse.

9. Which of the following is false?

a. There is currently only one cure for AIDS – AZT.
b. The HIV virus binds to the CD4 molecule of host cells.
c. Most manifestations of AIDS are explained by the loss of helper T cell functions.
d. Once infected by the virus, a person will test positive for HIV antibodies.
e. In order for HIV to replicate, viral RNA is used to make viral DNA, which is inserted into the host cell’s DNA.

10. An abnormal, exaggerated response of the immune system is called

a. tolerance.
b. immunization.
c. hypersensitivity.
d. excess immunity.
e. an innate immune response.

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