Question 1

Antigen-presenting cells are ________________,and they display antigens to both ________________ and ______________.

Accepted Answer

A)  immune cells;B-lymphocytes;T-lymphocytes
B)  immune cells;helper T-lymphocytes;cytotoxic T-lymphocytes
C)  any nucleated cell;B-lymphocytes;T-lymphocytes
D)  any anucleate cell;helper T-lymphocytes;cytotoxic T-lymphocytes
E)  any blood cell;helper B-lymphocytes;cytotoxic B-lymphocytesF) B) and E)
G) C) and D)

Question 2

Which type of antigen would have the greatest immunogenicity

Accepted Answer

A)  One that is small,simple,familiar,and abundant
B)  One that is small but complex and rare
C)  One that is large,complex,foreign,and abundant
D)  One that is large but simple and familiarE) None of the above
F) C) and D)

Question 3

Passive immunity lasts

Accepted Answer

A)  from days to weeks,and involves development of memory cells.
B)  from days to weeks,and does not involve development of memory cells.
C)  from years to a lifetime,and involves the development of memory cells.
D)  from years to a lifetime,and does not involve development of memory cells.E) A) and C)
F) A) and D)

Question 4

The microglia of the brain are macrophages.

Accepted Answer

A) True 
 B)False

Question 5

The concentration of a particular antibody within the blood is referred to as the antibody ________.

Accepted Answer

The answer of The concentration of a particular antibody within...

Question 6

As T-lymphocytes leave the thymus,they are

Accepted Answer

A)  naive and not yet competent.
B)  naive and immunocompetent.
C)  activated but not yet competent.
D)  activated and immunocompetent.E) A) and B)
F) C) and D)

Question 7

A fever __________ reproduction of bacteria and ___________ CAMs on the endothelium of capillaries of lymph nodes.

Accepted Answer

A)  stimulates;increases
B)  stimulates;decreases
C)  inhibits;increases
D)  inhibits;decreasesE) C) and D)
F) A) and D)

Question 8

Negative selection is the process by which cells learn self-tolerance.

Accepted Answer

A) True 
 B)False

Question 9

Erythrocytes are antigen-presenting cells.

Accepted Answer

A) True 
 B)False

Question 10

MHC class I molecules present peptide fragments that are either "self" or "nonself";in either case,the fragment becomes bound to the molecule while

Accepted Answer

A)  in the Golgi apparatus.
B)  in the cytosol.
C)  in a secretory vesicle.
D)  in the rough endoplasmic reticulum.E) A) and B)
F) A) and C)

Question 11

"Booster" shots are required following certain vaccinations because the memory B-lymphocytes produced in response to the initial vaccination don't survive indefinitely.

Accepted Answer

A) True 
 B)False

Question 12

B-lymphocytes cannot bind directly with an antigen,and so require presentation by another type of cell.

Accepted Answer

A) True 
 B)False

Question 13

Helper T-lymphocytes are also known as

Accepted Answer

A)  cytotoxic T-lymphocytes.
B)  CD8+cells.
C)  CD4+cells.
D)  T8 cells.
E)  memory T-lymphocytes.F) C) and D)
G) C) and E)

Question 14

"Complement" refers to a group of

Accepted Answer

A)  white blood cells.
B)  antibodies.
C)  plasma proteins.
D)  molecules on the surface of pathogenic microbes.E) None of the above
F) A) and D)

Question 15

Protozoans are obligate intracellular parasites.

Accepted Answer

A) True 
 B)False

Question 16

Opsonization involves

Accepted Answer

A)  cross-linking several antigens together so that they are no longer soluble,and it is facilitated by the Fc region of the antibody.
B)  marking a target for phagocytosis,and it is facilitated by interaction of the Fc region of the antibody with a phagocyte.
C)  activation of NK cells,and it is a function of the antigen-binding site of the antibody.
D)  fixation of antibodies in the IgG and IgM classes,and it involves the antigen-binding site of the antibody.E) A) and D)
F) A) and C)

Question 17

Upon activation,a T-lymphocyte

Accepted Answer

A)  ceases dividing and becomes a plasma cell.
B)  ceases dividing and becomes a memory cytotoxic helper cell.
C)  proliferates to form clones and memory cells.
D)  proliferates to form B cells and plasma cells.E) B) and D)
F) B) and C)

Question 18

Active immunity is a natural process,whereas passive immunity is generated artificially.

Accepted Answer

A) True 
 B)False

Question 19

Metals and plastics of artificial implants generally have high immunogenicity.

Accepted Answer

A) True 
 B)False

Question 20

Most bacterial species are pathogenic.

Accepted Answer

A) True 
 B)False

Exam 22: Immune System and the Bodys Defense

Which type of antigen would have the greatest immunogenicity

Correct AnswerverifiedShow Answer

Negative selection is the process by which cells learn self-tolerance.

Correct AnswerverifiedShow Answer

Metals and plastics of artificial implants generally have high immunogenicity.

Correct AnswerverifiedShow Answer

Protozoans are obligate intracellular parasites.

Correct AnswerverifiedShow Answer

Upon activation,a T-lymphocyte

Correct AnswerverifiedShow Answer

B-lymphocytes cannot bind directly with an antigen,and so require presentation by another type of cell.

Correct AnswerverifiedShow Answer

As T-lymphocytes leave the thymus,they are

Correct AnswerverifiedShow Answer

A fever __________ reproduction of bacteria and ___________ CAMs on the endothelium of capillaries of lymph nodes.

Correct AnswerverifiedShow Answer

"Booster" shots are required following certain vaccinations because the memory B-lymphocytes produced in response to the initial vaccination don't survive indefinitely.

Correct AnswerverifiedShow Answer

The microglia of the brain are macrophages.

Correct AnswerverifiedShow Answer

"Complement" refers to a group of

Correct AnswerverifiedShow Answer

Active immunity is a natural process,whereas passive immunity is generated artificially.

Correct AnswerverifiedShow Answer

Erythrocytes are antigen-presenting cells.

Correct AnswerverifiedShow Answer

Antigen-presenting cells are ________________,and they display antigens to both ________________ and ______________.

Correct AnswerverifiedShow Answer

Opsonization involves

Correct AnswerverifiedShow Answer

Most bacterial species are pathogenic.

Correct AnswerverifiedShow Answer

The concentration of a particular antibody within the blood is referred to as the antibody ________.

Correct AnswerverifiedShow Answer

MHC class I molecules present peptide fragments that are either "self" or "nonself";in either case,the fragment becomes bound to the molecule while

Correct AnswerverifiedShow Answer

Helper T-lymphocytes are also known as

Correct AnswerverifiedShow Answer

Passive immunity lasts

Correct AnswerverifiedShow Answer

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A fever reproduction of bacteria and _ CAMs on the endothelium of capillaries of lymph nodes.

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Antigen-presenting cells are __,and they display antigens to both and .

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