Question 1

Complement fixation can lead to any of the following effects except

Accepted Answer

A)  enhanced inflammation.
B)  opsonization.
C)  endogenous pyrexia.
D)  bacterial phagocytosis.
E)  cytolysis.F) All of the above
G) A) and B)

Question 2

The tonsils are the largest, and their surgical removal (tonsillectomy)  used to be one of the most common surgical procedures performed in children.

Accepted Answer

A)  adenoid
B)  lingual
C)  palatine
D)  pharyngeal
E)  nasopharyngealF) C) and D)
G) A) and C)

Question 3

Helper T (TH)  cells recognize antigens when they are bound to a(n)

Accepted Answer

A)  hapten.
B)  immunoglobulin.
C)  natural killer cell.
D)  major histocompatibility complex (MH
C)   protein.
E)  basophil.F) C) and D)
G) A) and B)

Question 4

This is the first of a series of neutrophil behaviors in inflammation.

Accepted Answer

A)  chemotaxis
B)  margination
C)  diapedesis
D)  phagocytosis
E)  opsonizationF) A) and B)
G) A) and E)

Question 5

Pyrogens act by increasing the set point for body temperature in the thalamus.

Accepted Answer

A) True 
 B)False

Question 6

Complement C3b protein coats bacteria and stimulates phagocytosis by in a process called .

Accepted Answer

A)  lymphocytes and monocytes; opsonization
B)  neutrophils and macrophages; cytolysis
C)  mast cells and basophils; opsonization
D)  mast cells and basophils; cytolysis
E)  neutrophils and macrophages; opsonizationF) B) and D)
G) A) and B)

Question 7

This is the correct sequence of events in the humoral immune response.

Accepted Answer

A)  antigen recognition → antigen presentation → differentiation → clonal selection → attack
B)  antigen recognition → antigen presentation → clonal selection → differentiation → attack
C)  antigen presentation → antigen recognition → clonal selection → differentiation → attack
D)  antigen presentation → antigen recognition → clonal selection → attack differentiation
E)  antigen recognition → differentiation → antigen presentation → clonal selection → attackF) B) and C)
G) A) and E)

Question 8

Some antibodies against foreign antigens can react to similar self-antigens causing an autoimmune
disease.

Accepted Answer

A) True 
 B)False

Question 9

Lymph originates in blood capillaries that pick up tissue fluid.

Accepted Answer

A) True 
 B)False

Question 10

The human immunodeficiency virus (HIV)  targets mainly

Accepted Answer

A)  helper T cells.
B)  B cells.
C)  plasma cells.
D)  cytotoxic T cells.
E)  natural killer cells.F) All of the above
G) A) and D)

Question 11

Interferons are secreted in response to bacterial infections.

Accepted Answer

A) True 
 B)False

Question 12

All of the following can act as antigen-presenting cells except

Accepted Answer

A)  reticular cells.
B)  dendritic cells.
C)  macrophages.
D)  B cells.
E)  T cells.F) None of the above
G) B) and E)

Question 13

Humoral immunity takes care of intracellular viruses, whereas cellular immunity takes care of
extracellular viruses.

Accepted Answer

A) True 
 B)False

Question 14

This is the class of immunoglobulin that provides passive immunity to the newborn.

Accepted Answer

A)  IgD
B)  IgE
C)  IgM
D)  IgA
E)  IgGF) B) and C)
G) A) and E)

Question 15

T cells achieve immunocompetence in

Accepted Answer

A)  the bone marrow.
B)  the bloodstream.
C)  the spleen.
D)  the thymus.
E)  the liver.F) A) and B)
G) C) and D)

Question 16

The majority of T cells of the naive lymphocyte pool wait for the encounter with foreign antigens in

Accepted Answer

A)  the plasma.
B)  the thymus.
C)  the lymphatic tissues.
D)  the lymph.
E)  most body fluids.F) A) and B)
G) B) and E)

Question 17

Naive T cells can synthesize antibodies.

Accepted Answer

A) True 
 B)False

Question 18

A person who is HIV-positive and has a helper T (TH)  cells count lower than has AIDS.

Accepted Answer

A)  20,000 cells/μL
B)  5,000 cells/μL
C)  1,000 cells/μL
D)  200 cells/μL
E)  50 cells/μLF) B) and D)
G) All of the above

Question 19

This organ shows a remarkable degree of degeneration (involution)  with age.

Accepted Answer

A)  lymph node
B)  thymus
C)  spleen
D)  pharyngeal tonsil
E)  appendixF) A) and B)
G) A) and C)

Question 20

constitutes about 80% of circulating antibodies in plasma.

Accepted Answer

A)  IgD
B)  IgE
C)  IgA
D)  IgM
E)  IgGF) B) and E)
G) All of the above

Exam 21: The Lymphatic and Immune Systems

Some antibodies against foreign antigens can react to similar self-antigens causing an autoimmune disease.

Correct AnswerverifiedShow Answer

The human immunodeficiency virus (HIV) targets mainly

Correct AnswerverifiedShow Answer

Lymph originates in blood capillaries that pick up tissue fluid.

Correct AnswerverifiedShow Answer

Naive T cells can synthesize antibodies.

Correct AnswerverifiedShow Answer

T cells achieve immunocompetence in

Correct AnswerverifiedShow Answer

constitutes about 80% of circulating antibodies in plasma.

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Complement C3b protein coats bacteria and stimulates phagocytosis by in a process called .

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This organ shows a remarkable degree of degeneration (involution) with age.

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The tonsils are the largest, and their surgical removal (tonsillectomy) used to be one of the most common surgical procedures performed in children.

Correct AnswerverifiedShow Answer

A person who is HIV-positive and has a helper T (TH) cells count lower than has AIDS.

Correct AnswerverifiedShow Answer

The majority of T cells of the naive lymphocyte pool wait for the encounter with foreign antigens in

Correct AnswerverifiedShow Answer

Complement fixation can lead to any of the following effects except

Correct AnswerverifiedShow Answer

This is the correct sequence of events in the humoral immune response.

Correct AnswerverifiedShow Answer

Interferons are secreted in response to bacterial infections.

Correct AnswerverifiedShow Answer

Humoral immunity takes care of intracellular viruses, whereas cellular immunity takes care of extracellular viruses.

Correct AnswerverifiedShow Answer

All of the following can act as antigen-presenting cells except

Correct AnswerverifiedShow Answer

This is the class of immunoglobulin that provides passive immunity to the newborn.

Correct AnswerverifiedShow Answer

Pyrogens act by increasing the set point for body temperature in the thalamus.

Correct AnswerverifiedShow Answer

Helper T (TH) cells recognize antigens when they are bound to a(n)

Correct AnswerverifiedShow Answer

This is the first of a series of neutrophil behaviors in inflammation.

Correct AnswerverifiedShow Answer

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