Question 1

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 2

The primary function of a phagocyte is to

Accepted Answer

A) destroy pathogens. 
B) engulf pathogens. 
C) evade pathogens. 
D) both engulf and destroy pathogens. 
A) destroy pathogens. 
B) engulf pathogens. 
C) evade pathogens. 
D) both engulf and destroy pathogens.

Question 3

________ is the acquired inability to mount an adaptive immune response against self.

Accepted Answer

A) Memory 
B) Specificity 
C) Tolerance 
D) Immunogenicity 
A) Memory 
B) Specificity 
C) Tolerance 
D) Immunogenicity

Question 4

Why are the chances of an immune response in a patient given between 10µg and 1g of an immunogen (drug)higher than a patient given higher than 1g or lower than 10µg of the same drug?

Accepted Answer

Extremely high (>1g)or low (<1

Question 5

Extremely high or low doses of an immunogen may suppress a specific immune response by stimulating the development of

Accepted Answer

A) specificity. 
B) memory. 
C) tolerance. 
D) class switching. 
A) specificity. 
B) memory. 
C) tolerance. 
D) class switching.

Question 6

Antigen exposure is necessary to

Accepted Answer

A) induce genetic hypermutation in B cells with productive antibody genes. 
B) stimulate B cell to differentiate to plasma cell. 
C) stimulate B cell to produce soluble antibodies. 
D) stimulate B cell differentiation,antibody production,and genetic hypermutation of antibody genes. 
A) induce genetic hypermutation in B cells with productive antibody genes. 
B) stimulate B cell to differentiate to plasma cell. 
C) stimulate B cell to produce soluble antibodies. 
D) stimulate B cell differentiation,antibody production,and genetic hypermutation of antibody genes.

Question 7

Some intracellular pathogens produce phagocyte-killing proteins called ________ that kill the phagocyte after ingestion of the pathogen.

Accepted Answer

A) antibodies 
B) antigens 
C) leukocidins 
D) pus 
A) antibodies 
B) antigens 
C) leukocidins 
D) pus

Question 8

Class I MHC proteins are found ONLY on the surface of B lymphocytes,macrophages,and dendritic cells.

Accepted Answer

A) True 
 B)False

Question 9

Th17 cells are important in the first stages of the adaptive immune response.

Accepted Answer

A) True 
 B)False

Question 10

Which of the following is a probable lifespan of memory B cells?

Accepted Answer

A) 5 minutes 
B) 5 hours 
C) 5 days 
D) 5 years 
A) 5 minutes 
B) 5 hours 
C) 5 days 
D) 5 years

Question 11

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

Question 12

Which of the following is the name of the heavy chain constant domain of an antibody?

Accepted Answer

A) beta 
B) delta 
C) zeta 
D) rho 
A) beta 
B) delta 
C) zeta 
D) rho

Question 13

Briefly describe the effect of deposition of antibody or complement on the surface of a pathogen or antigen in relation to opsonization.

Accepted Answer

Opsonization is the enhancement of phago

Question 14

The inducing antigens that react with an antibody are called heterologous antigens.

Accepted Answer

A) True 
 B)False

Question 15

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 16

HLAs are responsible for immune-mediated organ transplant rejection.

Accepted Answer

A) True 
 B)False

Question 17

The deactivation of NK cells due to binding of NK receptors to MHC I proteins is called

Accepted Answer

A) promoting. 
B) phagocytosis. 
C) licensing. 
D) neutralization. 
A) promoting. 
B) phagocytosis. 
C) licensing. 
D) neutralization.

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

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 20

The antigen that induces an antibody or TCR is called the

Accepted Answer

A) homologous antigen. 
B) heterologous antigen. 
C) cross-reactive antigen. 
D) immunogenic antigen. 
A) homologous antigen. 
B) heterologous antigen. 
C) cross-reactive antigen. 
D) immunogenic antigen.

Exam 25: Immune Mechanisms

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

The primary function of a phagocyte is to

________ is the acquired inability to mount an adaptive immune response against self.

Why are the chances of an immune response in a patient given between 10µg and 1g of an immunogen (drug)higher than a patient given higher than 1g or lower than 10µg of the same drug?

Extremely high or low doses of an immunogen may suppress a specific immune response by stimulating the development of

Antigen exposure is necessary to

Some intracellular pathogens produce phagocyte-killing proteins called ________ that kill the phagocyte after ingestion of the pathogen.

Class I MHC proteins are found ONLY on the surface of B lymphocytes,macrophages,and dendritic cells.

Th17 cells are important in the first stages of the adaptive immune response.

Which of the following is a probable lifespan of memory B cells?

Which of the following are NOT phagocytes?

Which of the following is the name of the heavy chain constant domain of an antibody?

Briefly describe the effect of deposition of antibody or complement on the surface of a pathogen or antigen in relation to opsonization.

The inducing antigens that react with an antibody are called heterologous antigens.

Dimers of IgA are present in

HLAs are responsible for immune-mediated organ transplant rejection.

The deactivation of NK cells due to binding of NK receptors to MHC I proteins is called

Th2 cells produce a cytokine that promotes growth and activation of other T cells and activates macrophages.

TH cells express a ________ protein coreceptor.

The antigen that induces an antibody or TCR is called the

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