Question 1

Which of the following cells is NOT an APC?

Accepted Answer

A)  dentritic cells
B)  macrophages
C)  mature B cells
D)  natural killer cells
E)  None of the answers is correct;all of these are APCs. D

Question 2

The implementation of vaccinations occurred prior to experimental support for the germ theory of disease.

Accepted Answer

A) True 
 B)False  True

Question 3

Which of the following bacterial components would most likely result in B cell stimulation by T-independent antigens?

Accepted Answer

A)  capsule
B)  flagellum
C)  pili
D)  ribosome
E)  plasmid A

Question 4

The importance of M cells concerns

Accepted Answer

A)  facilitation of contact between antigens in the intestinal tract and the immune system.
B)  presentation of epitopes in MHCII molecules.
C)  having microvilli to facilitate antigen capture.
D)  preventing damage to adaptive immune system cells.
E)  ability to migrate along the intestinal tract.

Question 5

ADCC is a process that is most effective in destroying

Accepted Answer

A)  eukaryotic pathogens.
B)  prions.
C)  extracellular viruses.
D)  bacterial pathogens.
E)  bacterial toxins.

Question 6

Which of the following is NOT a characteristic of B cells?

Accepted Answer

A)  They originate in bone marrow.
B)  They have antibodies on their surfaces.
C)  They are responsible for the memory response.
D)  They are responsible for antibody formation.
E)  They recognize antigens associated with MHC I.

Question 7

CD4⁺ T cells are activated by

Accepted Answer

A)  interaction between CD4⁺ and MHC II.
B)  interaction between TCRs and MHC II.
C)  cytokines released by dendritic cells.
D)  cytokines released by B cells.
E)  complement.

Question 8

A person has antibodies against the measles virus.Identify three ways in which these antibodies could be acquired.

Accepted Answer

The answer of A person has antibodies against the measles...

Question 9

What type of immunity results from transfer of antibodies from one individual to a susceptible individual by means of injection?

Accepted Answer

A)  innate immunity
B)  naturally acquired active immunity
C)  naturally acquired passive immunity
D)  artificially acquired active immunity
E)  artificially acquired passive immunity

Question 10

Plasma cells are activated by a(n)

Accepted Answer

A)  antigen.
B)  T cell.
C)  B cell.
D)  memory cell.
E)  APC.

Question 11

Large antibodies that agglutinate antigens are

Accepted Answer

A)  IgG.
B)  IgM.
C)  IgA.
D)  IgD.
E)  IgE.

Question 12

Which of the following recognizes antigens displayed on host cells with MHC II?

Accepted Answer

A)  TC cell
B)  B cell
C)  TH cell
D)  natural killer cell
E)  basophil

Question 13

Which of the following is the best definition of epitope?

Accepted Answer

A)  specific regions on antigens that interact with T-cell receptors
B)  specific regions on antigens that interact with MHC class molecules
C)  specific regions on antigens that interact with haptens
D)  specific regions on antigens that interact with antibodies
E)  specific regions on antigens that interact with perforins

Question 14

A very ill 48-year-old man comes to the Emergency Room and is diagnosed with pneumonia and thrush.Suspicious,the attending physician orders an HIV antibody test which comes back positive within a few hours.Why does a patient with acquired immunodeficiency have antibodies to HIV?

Accepted Answer

The answer of A very ill 48-year-old man comes to...

Question 15

Figure 17.2
 
-In Figure 17.2,which areas are similar for all IgG antibodies?

Accepted Answer

A)  a and b
B)  a and c
C)  b and c
D)  c and d
E)  b and d

Question 16

The presence of which of the following indicates a current infection rather than a previous infection or vaccination?

Accepted Answer

A)  IgA
B)  IgG
C)  IgM
D)  IgD
E)  IgE

Question 17

Which of the following terms regarding roles of chemical messengers is mismatched?

Accepted Answer

A)  hematopoetic cytokine - development of blood cells
B)  interleukins - communication between white blood cells
C)  chemokines - stimulate chemotaxis
D)  interferons - interruption of viral infection
E)  tumor necrosis factor - stimulate tumor metastasis

Question 18

Which of the following is NOT a characteristic of cellular immunity?

Accepted Answer

A)  The cells originate in bone marrow.
B)  Cells mature in the thymus gland.
C)  Response to abnormal cells.
D)  B cells make antibodies.
E)  T cells interact with epitopes in MHC molecules.

Question 19

Which terms regarding components of adaptive immunity are mismatched?

Accepted Answer

A)  Dendritic cells- Langerhans cell.
B)  activated macrophage - membrane ruffling.
C)  M cell - microfolds.
D)  TH cells - MHCI interaction.
E)  TH-17 cells - recruit neutrophils.

Question 20

Memory cells do not require B cell receptors.

Accepted Answer

A) True 
 B)False

Exam 17: Adaptive Immunity: Specific Defenses of the Host