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Review and Comprehension Quiz
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1
The lymphatic system
A)removes excess fluid from tissues.
B)absorbs fats from the digestive tract.
C)defends the body against microorganisms and other foreign substances.
D)all of the above.
2
Lymphatic capillaries
A)have a basement membrane.
B)are less permeable than blood capillaries.
C)prevent backflow of lymph into the tissues.
D)all of the above.
3
Lymph is moved through lymphatic vessels because of
A)contraction of surrounding skeletal muscles.
B)contraction of the heart.
C)pressure changes in the blood vessels.
D)flapping of the lymphatic valves.
E)pumping by lymph nodes.
4
Which of the following statements is true?
A)Lymphatic vessels do not have valves.
B)Lymphatic vessels empty into lymph nodes.
C)Lymph from the right-lower limb passes into the right jugular or subclavian vein.
D)Lymph from the jugular and subclavian trunks empties into the cisterna chyli.
E)All of the above.
5
The tonsils
A)consist of three groups of lymphatic nodules.
B)are located in the nasal cavity.
C)are located in the oral cavity.
D)increase in size in adults.
E)all of the above.
6
Lymph nodes
A)filter lymph.
B)are where lymphocytes divide and increase in number.
C)contain a network of reticular fibers.
D)contain lymphatic sinuses.
E)all of the above.
7
Which of these statements about the spleen is not correct?
A)The spleen has white pulp associated with the arteries.
B)The spleen has red pulp associated with the veins.
C)The spleen destroys defective red blood cells.
D)The spleen is surrounded by trabeculae located outside the capsule.
E)The spleen is a limited reservoir for blood.
8
The thymus
A)increases in size in adults.
B)produces macrophages that move to other lymphatic tissue.
C)responds to foreign substances in the blood.
D)has a blood-thymic barrier.
E)all of the above.
9
Which of these is an example of innate immunity?
A)Tears and saliva wash away microorganisms.
B)Basophils release histamine and leukotrienes.
C)Neutrophils phagocytize a microorganism.
D)The complement cascade is activated.
E)All of the above.
10
Neutrophils
A)enlarge to become macrophages.
B)account for most of the dead cells in pus.
C)are usually the last cell type to enter infected tissues.
D)are usually located in lymphatic and blood sinuses.
11
Macrophages
A)are large phagocytic cells that outlive neutrophils.
B)develop from mast cells.
C)often die after a single phagocytic event.
D)have the same function as eosinophils.
E)all of the above.
12
Which of these cells is the most important in the release of histamine, which promotes inflammation?
A)monocyte
B)macrophage
C)eosinophil
D)mast cell
E)natural killer cell
13
Which of these conditions does not occur during the inflammatory response?
A)histamine and other chemical mediators are released
B)chemotaxis of phagocytes
C)fibrinogen enters tissues from the blood
D)vasoconstriction of blood vessels
E)increased permeability of blood vessels
14
Which of these is a symptom of systemic inflammation?
A)large numbers of neutrophils are produced and released
B)pyrogens stimulate fever production
C)greatly increased vascular permeability
D)shock
E)all of the above
15
Antigens
A)are foreign substances introduced into the body.
B)are molecules produced by the body.
C)stimulate an adaptive immune system response.
D)all of the above.
16
B cells
A)are processed in the thymus.
B)originate in red bone marrow.
C)once released into the blood, remain in the blood.
D)are responsible for cell-mediated immunity.
E)all of the above.
17
MHC molecules
A)are glycoproteins.
B)attach to the plasma membrane.
C)have a variable region that can bind to foreign and self-antigens.
D)may form an MHC/antigen complex that activates T cells.
E)all of the above.
18
Antigen-presenting cells can
A)take in foreign antigens.
B)process antigens.
C)use MHC class II molecules to display the antigens.
D)stimulate other immune system cells.
E)all of the above.
19
Which of these participates in costimulation?
A)cytokines
B)complement
C)antibodies
D)histamine
E)natural killer cells
20
Helper T cells
A)respond to antigens from macrophages.
B)respond to cytokines from macrophages.
C)stimulate B cells with cytokines.
D)all of the above.
21
The most important function of tolerance is to
A)increase lymphocyte activity.
B)increase complement activation.
C)prevent the immune system from responding to self-antigens.
D)prevent excessive immune system response to foreign antigens.
E)process antigens.
22
Variable amino acid sequences on the arms of the antibody molecule
A)make the antibody specific for a given antigen.
B)enable the antibody to activate complement.
C)enable the antibody to attach to basophils and mast cells.
D)are part of the constant region.
E)all of the above.
23
Antibodies
A)prevent antigens from binding together.
B)promote phagocytosis.
C)inhibit inflammation.
D)block complement activation.
E)block the function of opsonins.
24
The secondary antibody response
A)is slower than the primary response.
B)produces fewer antibodies than the primary response.
C)prevents disease symptoms from occurring.
D)occurs because of cytotoxic T cells.
25
The type of lymphocyte that is responsible for the secondary antibody response is the
A)memory B cell.
B)B cell.
C)T cell.
D)helper T cell.
26
The largest percentage of antibodies in the blood are
A)IgA.
B)IgD.
C)IgE.
D)IgG.
E)IgM.
27
Antibody-mediated immunity
A)works best against intracellular antigens.
B)is involved in tumor control.
C)cannot be transferred from one person to another person.
D)is responsible for immediate hypersensitivity reactions.
28
The activation of cytotoxic T cells can result in the
A)lysis of virus-infected cells.
B)production of cytokines.
C)production of memory T cells.
D)all of the above.
29
Cytokines
A)promote inflammation.
B)activate macrophages.
C)kill target cells by causing them to lyse.
D)all of the above.
30
Delayed hypersensitivity is
A)caused by activation of B cells.
B)a result of antibodies reacting with an allergen.
C)mediated by T cells.
D)caused by natural killer cells.
E)caused by interferon.





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