Question 1

Another name for programmed cell death is

Accepted Answer

A)  necrosis. 
B)  perforation. 
C)  apoptosis. 
D)  cellular degradation. 
A)  necrosis. 
B)  perforation. 
C)  apoptosis. 
D)  cellular degradation. C

Question 2

The first cell type active in the innate response is usually a(n)

Accepted Answer

A)  phagocyte. 
B)  erythrocyte. 
C)  fibroblast. 
D)  antibody. 
A)  phagocyte. 
B)  erythrocyte. 
C)  fibroblast. 
D)  antibody. A

Question 3

The antigen-binding site of ALL antibodies form by interactions between the variable domains of the heavy and light chains.

Accepted Answer

A) True 
 B)False  True

Question 4

The increased rate of O₂ uptake by activated phagocytes is called the

Accepted Answer

A)  hypoxemia. 
B)  pyogenesis. 
C)  respiratory burst. 
D)  peroxidase. 
A)  hypoxemia. 
B)  pyogenesis. 
C)  respiratory burst. 
D)  peroxidase.

Question 5

PRRs were FIRST observed in phagocytes in Drosophila (where they are called Toll receptors).

Accepted Answer

A) True 
 B)False

Question 6

Briefly describe classical complement activation and cell damage.

Accepted Answer

Classical activation of complement occur

Question 7

The enhancement of phagocytosis due to deposition of antibody on the surface of a pathogen or antigen is called

Accepted Answer

A)  complementation. 
B)  opsonization. 
C)  inflammation. 
D)  antibody class switching. 
A)  complementation. 
B)  opsonization. 
C)  inflammation. 
D)  antibody class switching.

Question 8

Localized infections by pyogenic bacteria often form boils or abscesses.

Accepted Answer

A) True 
 B)False

Question 9

Monocytes are circulating precursors of macrophages and dendritic cells.

Accepted Answer

A) True 
 B)False

Question 10

TH cells express a ________ protein coreceptor.

Accepted Answer

A)  CD4 
B)  CD8 
C)  CD12 
D)  T cell receptin 
A)  CD4 
B)  CD8 
C)  CD12 
D)  T cell receptin

Question 11

How do NK cells discriminate between normal,healthy cells and virus-infected or tumor cells?

Accepted Answer

NK cells use special MHI receptors to re

Question 12

What are the major antigenic barriers for tissue transplantation from one individual to another?

Accepted Answer

In different individuals,MHC proteins ar

Question 13

Dimers of IgA are present in

Accepted Answer

A)  breast milk colostrum. 
B)  saliva. 
C)  tears. 
D)  breast milk colostrum, saliva, and tears. 
A)  breast milk colostrum. 
B)  saliva. 
C)  tears. 
D)  breast milk colostrum, saliva, and tears.

Question 14

Antigen-presenting cells present antigens to

Accepted Answer

A)  B lymphocytes. 
B)  T lymphocytes. 
C)  dendritic cells. 
D)  neutrophils. 
A)  B lymphocytes. 
B)  T lymphocytes. 
C)  dendritic cells. 
D)  neutrophils.

Question 15

Why are rabies shots given to domestic animals yearly and not just once in the animal's lifetime?

Accepted Answer

After the initial rabies vaccine immuniz

Question 16

The most common circulating antibody,comprising about 80% of the serum immunoglobin,is

Accepted Answer

A)  IgA. 
B)  IgC. 
C)  IgD. 
D)  IgG. 
A)  IgA. 
B)  IgC. 
C)  IgD. 
D)  IgG.

Question 17

Intrinsic properties of immunogens include

Accepted Answer

A)  appropriate physical form. 
B)  molecular size. 
C)  sufficient molecular complexity. 
D)  appropriate physical form, molecular size, and molecular complexity. 
A)  appropriate physical form. 
B)  molecular size. 
C)  sufficient molecular complexity. 
D)  appropriate physical form, molecular size, and molecular complexity.

Question 18

TH₂ cells produce a cytokine that promotes growth and activation of other T cells and activates macrophages.

Accepted Answer

A) True 
 B)False

Question 19

Oxygen compounds toxic to pathogens include

Accepted Answer

A)  hydrogen peroxide. 
B)  hypochlorus acid. 
C)  nitric oxide. 
D)  hydrogen peroxide, hypochlorus acid, and nitric oxide. 
A)  hydrogen peroxide. 
B)  hypochlorus acid. 
C)  nitric oxide. 
D)  hydrogen peroxide, hypochlorus acid, and nitric oxide.

Question 20

Which of the following are NOT phagocytes?

Accepted Answer

A)  dendritic cells 
B)  monocytes 
C)  neutrophils 
D)  erythrocytes 
A)  dendritic cells 
B)  monocytes 
C)  neutrophils 
D)  erythrocytes

Exam 25: Immune Mechanisms

Another name for programmed cell death is

The first cell type active in the innate response is usually a(n)

The antigen-binding site of ALL antibodies form by interactions between the variable domains of the heavy and light chains.

The increased rate of O₂ uptake by activated phagocytes is called the

PRRs were FIRST observed in phagocytes in Drosophila (where they are called Toll receptors).

Briefly describe classical complement activation and cell damage.

The enhancement of phagocytosis due to deposition of antibody on the surface of a pathogen or antigen is called

Localized infections by pyogenic bacteria often form boils or abscesses.

Monocytes are circulating precursors of macrophages and dendritic cells.

TH cells express a ________ protein coreceptor.

How do NK cells discriminate between normal,healthy cells and virus-infected or tumor cells?

What are the major antigenic barriers for tissue transplantation from one individual to another?

Dimers of IgA are present in

Antigen-presenting cells present antigens to

Why are rabies shots given to domestic animals yearly and not just once in the animal's lifetime?

The most common circulating antibody,comprising about 80% of the serum immunoglobin,is

Intrinsic properties of immunogens include

TH₂ cells produce a cytokine that promotes growth and activation of other T cells and activates macrophages.

Oxygen compounds toxic to pathogens include

Which of the following are NOT phagocytes?

Microorganisms and Microbiology

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Genetics of Bacteria and Archaea

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Vectorborne and Soilborne Bacterial and Viral Diseases

Water and Food As Vehicles of Bacterial Diseases

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