Question 1

A virus is ______ than a bacterial cell,and a virus is composed of a _________________.

Accepted Answer

A)  larger;nucleic acid within a protein capsid.
B)  larger;eukaryotic cell with a cell wall.
C)  smaller;nucleic acid within a protein capsid.
D)  smaller;eukaryotic cell with a cell wall.E) A) and B)
F) B) and C)

Question 2

When they leave the red marrow,pre-T-lymphocytes have

Accepted Answer

A)  only the CD4 protein.
B)  only the CD8 protein.
C)  both the CD4 and CD8 proteins.
D)  neither the CD4 nor CD8 protein.
E)  either the CD4 or CD8 protein.F) B) and C)
G) C) and D)

Question 3

Compared to most interstitial fluid in the body,the interstitial fluid of an inflamed area would have a lower osmolarity and a lower concentration of proteins.

Accepted Answer

A) True 
 B)False

Question 4

The first signal during helper T-lymphocyte activation involves

Accepted Answer

A)  BCR of the helper T-cell binding with free antigen and engulfing it.
B)  CD8 of the helper T-cell binding with MHC class III of the antigen-presenting cell.
C)  CD4 of the helper T-cell binding with MHC class I part of the antigen fragment.
D)  CD4 of the helper T-cell binding with MHC class II of the antigen-presenting cell.E) B) and C)
F) C) and D)

Question 5

Which of the following lists the body's first,second,and third lines of defense in order

Accepted Answer

A)  Adaptive immunity,external innate immunity,internal immunity
B)  External innate immunity,internal innate immunity,adaptive immunity
C)  External innate immunity,adaptive immunity,internal innate immunity
D)  External adaptive immunity,internal adaptive immunity,innate immunity
E)  Innate immunity,internal adaptive immunity,internal innate immunityF) None of the above
G) A) and B)

Question 6

Poison ivy contains a toxin that acts as a hapten by

Accepted Answer

A)  raising the body's sensitivity to a wide variety of chemicals such as penicillin.
B)  cutting plasma protein antibodies in half.
C)  preventing effective immune responses by blocking release of bradykinin.
D)  combining with a body protein and then triggering an immune response.E) B) and C)
F) B) and D)

Question 7

Pyrogens act on the __________ of the brain where they cause release of ________.

Accepted Answer

A)  hippocampus;PGE2
B)  hippocampus;exudate
C)  hypothalamus;PGE2
D)  hypothalamus;exudateE) A) and B)
F) A) and C)

Question 8

Cytokines are agents that affect neighboring cells without triggering systemic effects.

Accepted Answer

A) True 
 B)False

Question 9

Which type of cell attacks a variety of unwanted cells and causes those cells to undergo apoptosis

Accepted Answer

A)  Natural killer cells
B)  Basophils
C)  Neutrophils
D)  Eosinophils
E)  MacrophagesF) C) and D)
G) None of the above

Question 10

Which class of major histocompatibility molecules is specific to antigen-presenting cells

Accepted Answer

A)  MHC class I
B)  MHC class IIC) A) and B)
D) undefined

Question 11

Antigen presentation involves the display of an antigen

Accepted Answer

A)  inside the cytoplasm of a B-lymphocyte.
B)  on the surface of a cell so that a B-lymphocyte can be exposed to it.
C)  inside the cytoplasm of a T-lymphocyte.
D)  on the surface of a cell so that a T-lymphocyte can be exposed to it.E) All of the above
F) A) and B)

Question 12

What are the five main classes of immunoglobulins found in humans

Accepted Answer

A)  IgA,IgC,IgE,IgG,IgI
B)  IgD,IgE,IgG,IgM,IgS
C)  IgB,IgD,IgE,IgG,IgM
D)  IgA,IgB,IgC,IgD,IgE
E)  IgA,IgD,IgE,IgG,IgMF) C) and D)
G) B) and D)

Question 13

Which type of cell is the most effective to attack multicellular parasites such as tapeworms

Accepted Answer

A)  Basophils
B)  Eosinophils
C)  Macrophages
D)  NeutrophilsE) B) and D)
F) A) and D)

Question 14

Proteins known as _______ are produced by a variety of cells;they increase capillary permeability,increase CAM production in the endothelium,and stimulate pain receptors.

Accepted Answer

The answer of Proteins known as _______ are produced by...

Question 15

If someone had a cut in their skin through which a bacterium entered,but that bacterium was then destroyed by a neutrophil,this would be an example of

Accepted Answer

A)  failed external adaptive immunity,but successful innate immunity.
B)  failed innate immunity,but successful adaptive immunity.
C)  failed external innate immunity,but successful internal innate immunity.
D)  failed external immunity,but successful internal acquired immunity.E) C) and D)
F) A) and C)

Question 16

Which type of lymphocyte has coreceptors that assist in the interaction of the lymphocyte with a cell presenting antigen

Accepted Answer

A)  T-lymphocyte
B)  B-lymphocyteC) A) and B)
D) undefined

Question 17

Interleukin 1 and interferons act as

Accepted Answer

A)  defervescents and trigger an elevation of body temperature.
B)  defervescents and trigger a decrease of body temperature.
C)  pyrogens and trigger an elevation of body temperature.
D)  pyrogens and trigger a decrease of body temperature.E) None of the above
F) B) and D)

Question 18

Defensins and lysosomes are both part of ________ immunity and function as ___________.

Accepted Answer

A)  adaptive;physical barriers to pathogen entry
B)  adaptive;attackers of pathogenic cells
C)  innate;physical barriers to pathogen entry
D)  innate;attackers of pathogenic cellsE) A) and D)
F) None of the above

Question 19

The secondary response of the immune system to an infectious agent involves

Accepted Answer

A)  fewer cells than the antigen challenge,as the response has become more specific.
B)  more cells than the antigen challenge,due to the proliferation of memory cells.
C)  amnesia of past exposures,so that a perfectly adapted response can be generated to the new pathogen.D) B) and C)
E) A) and B)

Question 20

MHC class II molecules are loaded with exogenous antigen after the antigen has been digested into fragments within a phagolysosome.

Accepted Answer

A) True 
 B)False

Exam 22: Immune System and the Bodys Defense

The first signal during helper T-lymphocyte activation involves

Correct AnswerverifiedShow Answer

If someone had a cut in their skin through which a bacterium entered,but that bacterium was then destroyed by a neutrophil,this would be an example of

Correct AnswerverifiedShow Answer

Which type of lymphocyte has coreceptors that assist in the interaction of the lymphocyte with a cell presenting antigen

Correct AnswerverifiedShow Answer

Which of the following lists the body's first,second,and third lines of defense in order

Correct AnswerverifiedShow Answer

What are the five main classes of immunoglobulins found in humans

Correct AnswerverifiedShow Answer

Which type of cell attacks a variety of unwanted cells and causes those cells to undergo apoptosis

Correct AnswerverifiedShow Answer

When they leave the red marrow,pre-T-lymphocytes have

Correct AnswerverifiedShow Answer

Interleukin 1 and interferons act as

Correct AnswerverifiedShow Answer

The secondary response of the immune system to an infectious agent involves

Correct AnswerverifiedShow Answer

Antigen presentation involves the display of an antigen

Correct AnswerverifiedShow Answer

Pyrogens act on the __________ of the brain where they cause release of ________.

Correct AnswerverifiedShow Answer

Cytokines are agents that affect neighboring cells without triggering systemic effects.

Correct AnswerverifiedShow Answer

MHC class II molecules are loaded with exogenous antigen after the antigen has been digested into fragments within a phagolysosome.

Correct AnswerverifiedShow Answer

Defensins and lysosomes are both part of ________ immunity and function as ___________.

Correct AnswerverifiedShow Answer

Compared to most interstitial fluid in the body,the interstitial fluid of an inflamed area would have a lower osmolarity and a lower concentration of proteins.

Correct AnswerverifiedShow Answer

Proteins known as _______ are produced by a variety of cells;they increase capillary permeability,increase CAM production in the endothelium,and stimulate pain receptors.

Correct AnswerverifiedShow Answer

A virus is ______ than a bacterial cell,and a virus is composed of a _________________.

Correct AnswerverifiedShow Answer

Poison ivy contains a toxin that acts as a hapten by

Correct AnswerverifiedShow Answer

Which class of major histocompatibility molecules is specific to antigen-presenting cells

Correct AnswerverifiedShow Answer

Which type of cell is the most effective to attack multicellular parasites such as tapeworms

Correct AnswerverifiedShow Answer

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Pyrogens act on the __ of the brain where they cause release of .

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Defensins and lysosomes are both part of immunity and function as ___.

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A virus is than a bacterial cell,and a virus is composed of a ___________.

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