Question 1

A child is born with a congenital disease that results in total loss of B cells. Which of the following would be a consequence of this immunodeficiency?

Accepted Answer

A)   no lymphokine production
B)   lack of antibody formation
C)   nonfunctioning complement system
D)   inability to form any type of memory cell
E)   no antigens on the cellsF) None of the above
G) B) and E)

Question 2

Several days after an initial contact with an antigen, antibody blood levels increases. This is a

Accepted Answer

A)   primer response.
B)   primary response.
C)   precipitating response.
D)   principle response.
E)   cascade response.F) A) and E)
G) A) and B)

Question 3

Match the appropriate characteristic with the type of immunity.
-memory cells

Accepted Answer

A)  innate immunity
B)  antibody-mediated immunity
C)  cell-mediated immunity
D)  both antibody and cell-mediated immunity
E)  innate immunity, antibody-mediated immunity and cell-mediated immunityF) C) and D)
G) A) and D)

Question 4

Which of the following statements accurately describes the thymus gland?

Accepted Answer

A)   The thymus gland lacks a capsule.
B)   The thymus gland contains many reticular fibers.
C)   The thymus gland decreases in size after age 60.
D)   Lymphocytes are found only in the medulla of the thymus gland.
E)   The thymus increases in size with aging.F) All of the above
G) C) and D)

Question 5

Cytotoxic T cells

Accepted Answer

A)   produce antibodies for general circulation.
B)   attach to the surface of cells causing them to lyse.
C)   cause precipitation of antigens.
D)   have IgG antibodies on their cell membranes.
E)   are destroyed after contact killing.F) A) and B)
G) C) and E)

Question 6

During the inflammatory response,

Accepted Answer

A)   vasoconstriction occurs.
B)   chemical mediators are released.
C)   vascular permeability is decreased.
D)   neutrophil production is depressed.
E)   blood flow is reduced.F) B) and E)
G) C) and D)

Question 7

Match the term with the appropriate description.
-histamine

Accepted Answer

A)  lipids that cause smooth muscle relaxation and vasodilation
B)  lymph nodules aggregated in the small intestinal wall
C)  rounded epithelial structures found in the medulla of thymus
D)  areas of a lymph node where lymphocytes divide
E)  a chemical released from mast cells that causes vasodilationF) A) and E)
G) C) and E)

Question 8

Stimulating the proliferation of cytotoxic T cells to destroy cancer cells is an example of

Accepted Answer

A)   immunotherapy.
B)   immunocompetence.
C)   tolerance.
D)   passive artificial acquired immunity.
E)   passive natural acquired immunity.F) A) and B)
G) A) and C)

Question 9

Which is the proper order of events in cell-mediated immunity? (1)  cloning of cytotoxic T cells and memory T cells
(2)  antigen presented to T lymphocyte
(3)  activation of T lymphocytes
(4)  cytotoxic T cells attack target cells

Accepted Answer

A)   2, 3, 4, 1
B)   1, 4, 2, 3
C)   2, 3, 1, 4
D)   3, 2, 4, 1
E)   1, 2, 3, 4,F) A) and B)
G) A) and C)

Question 10

Nonencapsulated lymphatic tissue called MALT includes all of the following except:

Accepted Answer

A)   tonsils.
B)   Peyer patches.
C)   lymph nodes.
D)   diffuse lymphatic tissue.E) None of the above
F) A) and B)

Question 11

Lymphocyte activation can occur in several ways. However, in all cases

Accepted Answer

A)   lymphocytes must recognize an antigen.
B)   helper T cells are activated first and they then stimulate other cells.
C)   antigen-presenting cells process the antigen and present it to the lymphocytes.
D)   cytokines released by the antigen stimulate the lymphocyte response.
E)   antigens must be able to recognize the lymphocytes.F) B) and C)
G) A) and D)

Question 12

An MHC class II/antigen complex on the surface of an antigen-presenting cell (APC)  binds to a T-cell receptor. What results from this interaction?

Accepted Answer

A)   Other immune cells are inhibited
B)   The antigen is phagocytized by the T cell
C)   The T cell responds by directly destroying the APC
D)   Other immune cells are stimulated to respond to the antigenE) B) and D)
F) None of the above

Question 13

During the development of lymphocytes, some pre-T and pre-B cells survive and develop into cells capable of an immune response, this is referred to as ______ selection. However some cells are suppressed from responding to self antigens, this is referred to as ______ selection.

Accepted Answer

A)   negative; positive
B)   neutral; negative
C)   negative; neutral
D)   neutral; positive
E)   positive; negativeF) A) and E)
G) A) and D)

Question 14

What is the function of thymosin?

Accepted Answer

A)   destroys damaged red blood cells
B)   destroys damaged white blood cells
C)   activates lymphocytes in lymph nodes
D)   maturation of T-cellsE) A) and B)
F) C) and D)

Question 15

A surface chemical that prevents microbial growth is

Accepted Answer

A)   histamine.
B)   leukotriene.
C)   sebum.
D)   kinin.
E)   interferon.F) A) and B)
G) A) and C)

Question 16

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

Accepted Answer

A)   eosinophil
B)   lymphocyte
C)   monocyte
D)   natural killer cell
E)   neutrophilF) A) and E)
G) B) and D) E

Question 17

Lymph capillaries are found in the

Accepted Answer

A)   epidermis.
B)   cornea.
C)   bone marrow.
D)   central nervous system.
E)   dermis.F) A) and B)
G) C) and D)

Question 18

Defense mechanisms that respond at the same speed and efficiency upon repeated exposure are classified as ______ immunity and defense mechanisms that increase in speed and strength upon repeated exposure are classified as ______ immunity.

Accepted Answer

A)   innate; non-specific
B)   adaptive; innate
C)   specific; innate
D)   innate; adaptiveE) A) and B)
F) All of the above D

Question 19

Match the appropriate characteristic with the type of immunity.
-tears and saliva

Accepted Answer

A)  innate immunity
B)  antibody-mediated immunity
C)  cell-mediated immunity
D)  both antibody and cell-mediated immunity
E)  innate immunity, antibody-mediated immunity and cell-mediated immunityF) B) and E)
G) All of the above

Question 20

The process of eliminating those lymphocytes that react or respond against self-antigens is called

Accepted Answer

A)   phagocytosis.
B)   inflammation.
C)   negative selection.
D)   activation of complement.
E)   natural selection.F) A) and D)
G) C) and D) C

Exam 22: Lymphatic System and Immunity

A child is born with a congenital disease that results in total loss of B cells. Which of the following would be a consequence of this immunodeficiency?

Correct AnswerverifiedShow Answer

Several days after an initial contact with an antigen, antibody blood levels increases. This is a

Correct AnswerverifiedShow Answer

Match the appropriate characteristic with the type of immunity. -memory cells

Correct AnswerverifiedShow Answer

Which of the following statements accurately describes the thymus gland?

Correct AnswerverifiedShow Answer

Cytotoxic T cells

Correct AnswerverifiedShow Answer

During the inflammatory response,

Correct AnswerverifiedShow Answer

Match the term with the appropriate description. -histamine

Correct AnswerverifiedShow Answer

Stimulating the proliferation of cytotoxic T cells to destroy cancer cells is an example of

Correct AnswerverifiedShow Answer

Which is the proper order of events in cell-mediated immunity? (1) cloning of cytotoxic T cells and memory T cells (2) antigen presented to T lymphocyte (3) activation of T lymphocytes (4) cytotoxic T cells attack target cells

Correct AnswerverifiedShow Answer

Nonencapsulated lymphatic tissue called MALT includes all of the following except:

Correct AnswerverifiedShow Answer

Lymphocyte activation can occur in several ways. However, in all cases

Correct AnswerverifiedShow Answer

An MHC class II/antigen complex on the surface of an antigen-presenting cell (APC) binds to a T-cell receptor. What results from this interaction?

Correct AnswerverifiedShow Answer

During the development of lymphocytes, some pre-T and pre-B cells survive and develop into cells capable of an immune response, this is referred to as ______ selection. However some cells are suppressed from responding to self antigens, this is referred to as ______ selection.

Correct AnswerverifiedShow Answer

What is the function of thymosin?

Correct AnswerverifiedShow Answer

A surface chemical that prevents microbial growth is

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedE

Lymph capillaries are found in the

Correct AnswerverifiedShow Answer

Defense mechanisms that respond at the same speed and efficiency upon repeated exposure are classified as ______ immunity and defense mechanisms that increase in speed and strength upon repeated exposure are classified as ______ immunity.

Correct AnswerverifiedD

Match the appropriate characteristic with the type of immunity. -tears and saliva

Correct AnswerverifiedShow Answer

The process of eliminating those lymphocytes that react or respond against self-antigens is called

Correct AnswerverifiedC

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During the development of lymphocytes, some pre-T and pre-B cells survive and develop into cells capable of an immune response, this is referred to as selection. However some cells are suppressed from responding to self antigens, this is referred to as selection.

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E

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Defense mechanisms that respond at the same speed and efficiency upon repeated exposure are classified as immunity and defense mechanisms that increase in speed and strength upon repeated exposure are classified as immunity.

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D

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C