Question 1

Stem cells that will form B cells or NK cells are found only in the

Accepted Answer

A)   red bone marrow.
B)   liver.
C)   spleen.
D)   thymus.
E)   kidneys.F) All of the above
G) C) and D)

Question 2

The process by which antibodies bind to antigenic sites on viruses or toxins, rendering them incapableofbinding to other cells, is called

Accepted Answer

A)   opsonization.
B)   activation.
C)   agglutination.
D)   precipitation.
E)   neutralization.F) C) and D)
G) All of the above

Question 3

Compared to blood capillaries, lymph capillaries exhibit all of the following except that they

Accepted Answer

A)   have no basement membrane.
B)   have only a tunica interna.
C)   have walls of endothelial cells that overlap like shingles.
D)   are smaller in diameter.
E)   are frequently irregular in shape.F) A) and E)
G) None of the above

Question 4

The various classes of immunoglobulins are differentiated on the basis of their

Accepted Answer

A)   asymmetry.
B)   antigen specificity.
C)   light-chain variable segments.
D)   heavy-chain constant segments.
E)   reactivity.F) B) and D)
G) All of the above

Question 5

All of the following are true of the primary response of humoral immunity except that

Accepted Answer

A)   it depends on antigen triggering the appropriate B cell.
B)   it requires B cell differentiation into plasma cells.
C)   it depends on memory B cells.
D)   circulating antibodies undergo a gradual, sustained rise.
E)   it peaks 1 to 2 weeks after the initial exposure.F) A) and E)
G) B) and E)

Question 6

Immunity that is genetically determined and present at birth is called ________ immunity.

Accepted Answer

A)   active
B)   natural passive
C)   passive
D)   auto
E)   innateF) A) and D)
G) B) and D)

Question 7

The process by which the surface of a microorganism is covered with antibodies and complement, rendering it more likely to be phagocytized, is called

Accepted Answer

A)   opsonization.
B)   activation.
C)   agglutination.
D)   precipitation.
E)   neutralization.F) C) and E)
G) A) and C) A

Question 8

The process by which antibodies bind to the antigen on the surface of cells, forming large immune complexes, is called

Accepted Answer

A)   opsonization.
B)   activation.
C)   agglutination.
D)   precipitation.
E)   neutralization.F) A) and E)
G) D) and E)

Question 9

The body's innate defenses include all of the following except

Accepted Answer

A)   the skin.
B)   complement.
C)   interferon.
D)   inflammation.
E)   antibodies.F) D) and E)
G) A) and E)

Question 10

Helper T cells do all of the following except

Accepted Answer

A)   trigger B-cell division, plasma cell maturation, and antibody production.
B)   provide a rapid response to a future exposure to the antigen.
C)   enhance production of memory and cytotoxic T cells.
D)   attract macrophages to the affected area.
E)   enhance nonspecific defenses.F) A) and E)
G) C) and D)

Question 11

The first line of cellular defense against pathogens are the

Accepted Answer

A)   T cells.
B)   B cells.
C)   NK cells.
D)   phagocytes.
E)   plasma cells.F) None of the above
G) A) and B)

Question 12

Histamine increases blood flow and vascular permeability. This would account for all of the following changes that occur during inflammation except

Accepted Answer

A)   redness of the inflamed tissue.
B)   chemotaxis of phagocytes.
C)   heat of the inflamed tissue.
D)   movement of defense proteins and cells into the interstitial space.
E)   swelling of the inflamed tissue.F) All of the above
G) None of the above

Question 13

The cells directly responsible for cellular immunity are the ________ cells.

Accepted Answer

A)   dendritic
B)   plasma
C)   helper T
D)   cytotoxic T
E)   suppressor TF) A) and B)
G) A) and C)

Question 14

Stem cells that can form all types of lymphocytes are concentrated in the

Accepted Answer

A)   circulation.
B)   thymus.
C)   red bone marrow.
D)   spleen.
E)   yellow marrow.F) C) and D)
G) D) and E)

Question 15

You are a researcher interested in studying the cytoskeleton. How can you use antibodies to locate actin-and tubulin-containing structures?

Accepted Answer

Since those cytoskeletal components are ...

Question 16

An inflammatory response is triggered when

Accepted Answer

A)   red blood cells release pyrogens.
B)   T cells release interferon.
C)   mast cells release histamine and heparin.
D)   neutrophils phagocytize bacteria.
E)   blood flow to an area increases.F) A) and B)
G) B) and E)

Question 17

If the thymus shrank and stopped making thymosins, we would expect to see an immediate decrease in the number of

Accepted Answer

A)   B lymphocytes.
B)   NK cells.
C)   T cells.
D)   neutrophils.
E)   red blood cells.F) All of the above
G) B) and E)

Question 18

T Lymphocytes are produced and stored in all of the following except

Accepted Answer

A)   the thymus.
B)   lymphatic nodules.
C)   lymph node organs.
D)   the spleen.
E)   the brain.F) C) and D)
G) A) and E) E

Question 19

Interferons

Accepted Answer

A)   prevent viruses from leaving a cell.
B)   prevent viruses from entering a cell.
C)   bind to viruses and destroy them.
D)   interfere with viral replication.
E)   reduce macrophage chemotaxis to the infection.F) C) and D)
G) B) and C) D

Question 20

All of the following are true of the secondary response of humoral immunity except that it

Accepted Answer

A)   depends on memory B cells.
B)   results in much higher antibody titers than in the primary response.
C)   results in much quicker rise in antibody titers.
D)   produces more effective antibodies.
E)   weakens quickly because memory B cells only survive for a year or two.F) None of the above
G) B) and D)

Exam 22: The Lymphatic System and Immunity

Stem cells that will form B cells or NK cells are found only in the

Correct AnswerverifiedShow Answer

The process by which antibodies bind to antigenic sites on viruses or toxins, rendering them incapableofbinding to other cells, is called

Correct AnswerverifiedShow Answer

Compared to blood capillaries, lymph capillaries exhibit all of the following except that they

Correct AnswerverifiedShow Answer

The various classes of immunoglobulins are differentiated on the basis of their

Correct AnswerverifiedShow Answer

All of the following are true of the primary response of humoral immunity except that

Correct AnswerverifiedShow Answer

Immunity that is genetically determined and present at birth is called ________ immunity.

Correct AnswerverifiedShow Answer

The process by which the surface of a microorganism is covered with antibodies and complement, rendering it more likely to be phagocytized, is called

Correct AnswerverifiedA

The process by which antibodies bind to the antigen on the surface of cells, forming large immune complexes, is called

Correct AnswerverifiedShow Answer

The body's innate defenses include all of the following except

Correct AnswerverifiedShow Answer

Helper T cells do all of the following except

Correct AnswerverifiedShow Answer

The first line of cellular defense against pathogens are the

Correct AnswerverifiedShow Answer

Histamine increases blood flow and vascular permeability. This would account for all of the following changes that occur during inflammation except

Correct AnswerverifiedShow Answer

The cells directly responsible for cellular immunity are the ________ cells.

Correct AnswerverifiedShow Answer

Stem cells that can form all types of lymphocytes are concentrated in the

Correct AnswerverifiedShow Answer

You are a researcher interested in studying the cytoskeleton. How can you use antibodies to locate actin-and tubulin-containing structures?

Correct AnswerverifiedSince those cytoskeletal components are ...View AnswerShow Answer

An inflammatory response is triggered when

Correct AnswerverifiedShow Answer

If the thymus shrank and stopped making thymosins, we would expect to see an immediate decrease in the number of

Correct AnswerverifiedShow Answer

T Lymphocytes are produced and stored in all of the following except

Correct AnswerverifiedE

Interferons

Correct AnswerverifiedD

All of the following are true of the secondary response of humoral immunity except that it

Correct AnswerverifiedShow Answer

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A

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Since those cytoskeletal components are ...
View Answer

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E

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D

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