Question 1

The clumping of foreign cells that occurs when antibodies cross-link their antigens is known as

Accepted Answer

A)  agglutination.
B)  neutralization.
C)  precipitation.
D)  opsonization.
E)  fixation.F) A) and E)
G) None of the above

Question 2

MHC class I molecules are

Accepted Answer

A)  glycolipid synthesized on the smooth endoplasmic reticulum.
B)  glycoproteins synthesized on the rough endoplasmic reticulum.
C)  small peptides synthesized on free ribosomes.
D)  phospholipids synthesized in secretory vesicles.E) A) and B)
F) B) and C)

Question 3

Malaria is a disease caused by a

Accepted Answer

A)  multicellular parasite.
B)  protozoan.
C)  fungus.
D)  virus.
E)  bacterium.F) B) and E)
G) A) and B)

Question 4

Consuming meat that has been infected with a prion can lead to the disease

Accepted Answer

A)  trichomoniasis.
B)  bovine spongiform encephalopathy.
C)  clostridium tetani.
D)  histoplasmosis.E) All of the above
F) A) and C)

Question 5

Which class of chemical messenger facilitates white blood cell formation in bone marrow

Accepted Answer

A)  Interleukins
B)  Colony-stimulating factors
C)  Tumor necrosis factors
D)  InterferonsE) A) and B)
F) A) and C)

Question 6

Immunity can be transferred from mother to child.When the child's immunity is acquired

Accepted Answer

A)  through the placenta,it is passive immunity,but through breastmilk it is active immunity.
B)  through the placenta or through breastmilk,it is passive immunity.
C)  through the placenta or through breastmilk,it is active immunity.
D)  through the placenta,it is active immunity,but through the breastmilk it is passive immunity.E) None of the above
F) A) and B)

Question 7

When an antibody covers the region of a virus that the virus uses to bind to a cell receptor,that covering function is known as ____________.

Accepted Answer

The answer of When an antibody covers the region of...

Question 8

Which cell type is targeted by the human immunodeficiency virus (HIV)

Accepted Answer

A)  Cytotoxic T-lymphocyte
B)  Memory B-lymphocyte
C)  Helper T-lymphocyte
D)  Natural killer cell
E)  Plasma cellF) A) and B)
G) B) and E)

Question 9

A variety of lymphatic cells are involved in the immune response.Which is not part of the process

Accepted Answer

A)  Production of antibodies
B)  Direct attack and destruction of foreign or abnormal agents
C)  Replication of antigens
D)  Formation of memory cellsE) C) and D)
F) A) and B)

Question 10

The Fc region of some antibodies can trigger the activity of NK cells.

Accepted Answer

A) True 
 B)False

Question 11

"Mad cow disease" (variant Creutzfeldt-Jakob disease) is caused by a

Accepted Answer

A)  fungus.
B)  protozoan.
C)  prion.
D)  virus.
E)  bacterium.F) A) and C)
G) C) and E)

Question 12

The site of infection is the location at which lymphocytes

Accepted Answer

A)  are formed.
B)  provide an effector response.
C)  are activated.
D)  become able to recognize one specific foreign antigen.E) C) and D)
F) A) and B)

Question 13

An immunoglobulin is a(n)

Accepted Answer

A)  antibody,which is a white blood cell.
B)  antibody,which is a protein molecule.
C)  lymphocyte,which is a white blood cell.
D)  lymphocyte,which is a protein molecule.
E)  antigen,which is a cell receptor.F) All of the above
G) A) and E)

Question 14

Agglutination of mismatched blood is a function of

Accepted Answer

A)  IgD,which is a dimer.
B)  IgD,which is a pentamer.
C)  IgM,which is a dimer.
D)  IgM,which is a pentamer.E) A) and B)
F) B) and C)

Question 15

The function of helper T-lymphocytes is to

Accepted Answer

A)  initiate and oversee the immune response.
B)  turn off the immune response once it has been activated.
C)  secrete toxins to kill or disable pathogens.
D)  trigger cell death by disrupting metabolic activities.
E)  All choices are correct.F) A) and B)
G) B) and E)

Question 16

Once a helper T-lymphocyte recognizes an antigen,it begins the immune response by secreting chemical signals called

Accepted Answer

A)  antibodies.
B)  immunoglobulins.
C)  memory B-lymphocytes.
D)  memory T-lymphocytes.
E)  cytokines.F) All of the above
G) A) and B)

Question 17

Most activated B-lymphocytes differentiate into

Accepted Answer

A)  memory helper T-lymphocytes.
B)  macrophages.
C)  plasma cells.
D)  antigen-presenting cells.E) None of the above
F) A) and D)

Question 18

Which type of cell produces and secretes antibodies

Accepted Answer

A)  Memory B-lymphocyte
B)  Memory T-lymphocyte
C)  Natural killer cell
D)  Plasma cell
E)  Cytotoxic T-lymphocyteF) B) and C)
G) B) and D)

Question 19

Lymphocytes that are able to bind and respond to antigen are said to be _______________.

Accepted Answer

The answer of Lymphocytes that are able to bind and...

Question 20

Elevated antibody production during a primary response generally lasts for months or years,whereas antibody production in secondary responses decreases to baseline level generally within a couple of weeks.

Accepted Answer

A) True 
 B)False

Exam 22: Immune System and the Bodys Defense

MHC class I molecules are

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Elevated antibody production during a primary response generally lasts for months or years,whereas antibody production in secondary responses decreases to baseline level generally within a couple of weeks.

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Which type of cell produces and secretes antibodies

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Most activated B-lymphocytes differentiate into

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Immunity can be transferred from mother to child.When the child's immunity is acquired

Correct AnswerverifiedShow Answer

"Mad cow disease" (variant Creutzfeldt-Jakob disease) is caused by a

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The Fc region of some antibodies can trigger the activity of NK cells.

Correct AnswerverifiedShow Answer

Which class of chemical messenger facilitates white blood cell formation in bone marrow

Correct AnswerverifiedShow Answer

Lymphocytes that are able to bind and respond to antigen are said to be _______________.

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An immunoglobulin is a(n)

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When an antibody covers the region of a virus that the virus uses to bind to a cell receptor,that covering function is known as ____________.

Correct AnswerverifiedShow Answer

Which cell type is targeted by the human immunodeficiency virus (HIV)

Correct AnswerverifiedShow Answer

Agglutination of mismatched blood is a function of

Correct AnswerverifiedShow Answer

Malaria is a disease caused by a

Correct AnswerverifiedShow Answer

Once a helper T-lymphocyte recognizes an antigen,it begins the immune response by secreting chemical signals called

Correct AnswerverifiedShow Answer

The function of helper T-lymphocytes is to

Correct AnswerverifiedShow Answer

The clumping of foreign cells that occurs when antibodies cross-link their antigens is known as

Correct AnswerverifiedShow Answer

A variety of lymphatic cells are involved in the immune response.Which is not part of the process

Correct AnswerverifiedShow Answer

Consuming meat that has been infected with a prion can lead to the disease

Correct AnswerverifiedShow Answer

The site of infection is the location at which lymphocytes

Correct AnswerverifiedShow Answer

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