Question 1

The variable regions from the light and heavy chains of an antibody combine to form .

Accepted Answer

antigen- b

Question 2

is required for helper T cells to bind antigen.

Accepted Answer

The answer of is required for helper T cells to...

Question 3

Which of the following statements concerning adaptive immunity is incorrect?

Accepted Answer

A)  It is the third line of defense. 
B)  It takes a long time to respond whenever it encounters a pathogen. 
C)  It is acquired. 
D)  It is the body's ability to respond to specific invading pathogens. 
E)  It has memory. 
A)  It is the third line of defense. 
B)  It takes a long time to respond whenever it encounters a pathogen. 
C)  It is acquired. 
D)  It is the body's ability to respond to specific invading pathogens. 
E)  It has memory.

Question 4

A single B lymphocyte can recognize multiple antigenic determinants.

Accepted Answer

A) True 
 B)False

Question 5

The major histocompatibility antigens are coded for by genes on which chromosome number?

Accepted Answer

A)  21 
B)  6 
C)  3 
D)  12 
E)  16 
A)  21 
B)  6 
C)  3 
D)  12 
E)  16

Question 6

Humoral immunity is mediated by membrane- bound proteins and cytokines.

Accepted Answer

A) True 
 B)False

Question 7

An invading bacterial cell would be a source of which of the following?

Accepted Answer

A)  endogenous antigens 
B)  self- antigens 
C)  exogenous antigens 
D)  antibody antigens 
E)  autoantigens 
A)  endogenous antigens 
B)  self- antigens 
C)  exogenous antigens 
D)  antibody antigens 
E)  autoantigens

Question 8

Which of the following statements concerning plasma cells is incorrect?

Accepted Answer

A)  They live a long time and function as memory cells. 
B)  They secrete antibody molecules with antigen- determining sites that only act against specific antigen determinants. 
C)  They produce 2000 antibodies per second. 
D)  They are activated B cells. 
E)  The antibodies they produce can remain in circulation for weeks. 
A)  They live a long time and function as memory cells. 
B)  They secrete antibody molecules with antigen- determining sites that only act against specific antigen determinants. 
C)  They produce 2000 antibodies per second. 
D)  They are activated B cells. 
E)  The antibodies they produce can remain in circulation for weeks.

Question 9

What are the steps involved in B cell activation?

Accepted Answer

B cell activation involves many steps. F

Question 10

Which of the following statements about T lymphocytes is incorrect?

Accepted Answer

A)  T lymphocytes are called such because they mature in the thymus. 
B)  There are three types of T lymphocytes. 
C)  T lymphocytes act directly against antigens and produce the cell- mediated immune response. 
D)  There are fewer types of T cell receptors than B cell receptors and therefore the T lymphocyte cannot react with as many types of antigens. 
E)  T lymphocytes have TCRs that recognize antigen only if it is bound to MHC. 
A)  T lymphocytes are called such because they mature in the thymus. 
B)  There are three types of T lymphocytes. 
C)  T lymphocytes act directly against antigens and produce the cell- mediated immune response. 
D)  There are fewer types of T cell receptors than B cell receptors and therefore the T lymphocyte cannot react with as many types of antigens. 
E)  T lymphocytes have TCRs that recognize antigen only if it is bound to MHC.

Question 11

Experiments in which tissue was transferred from one animal to another led to tdhiescovery of _ antigen

Accepted Answer

major hist

Question 12

The ability of the body to recognize its own antigens is called .

Accepted Answer

The answer of The ability of the body to recognize...

Question 13

The designation "B" for B lymphocytes comes from

Accepted Answer

A)  the bursa of Fabricius in birds where these cells were first identified. 
B)  the sequence in which these lymphocytes were discovered. 
C)  the bone marrow where these cells are produced. 
D)  the fact that these cells produce antibodies. 
E)  the ability of these cells to provide immunity through body fluids. 
A)  the bursa of Fabricius in birds where these cells were first identified. 
B)  the sequence in which these lymphocytes were discovered. 
C)  the bone marrow where these cells are produced. 
D)  the fact that these cells produce antibodies. 
E)  the ability of these cells to provide immunity through body fluids.

Question 14

When a T cell's CD95L binds to the CD95 on a target cell, apoptosis is triggered.

Accepted Answer

A) True 
 B)False

Question 15

The humoral immune response is attributed to the action of

Accepted Answer

A)  monocytes. 
B)  neutrophils. 
C)  B lymphocytes. 
D)  T lymphocytes. 
E)  macrophages. 
A)  monocytes. 
B)  neutrophils. 
C)  B lymphocytes. 
D)  T lymphocytes. 
E)  macrophages.

Question 16

Antigens are

Accepted Answer

A)  proteins the body produces against invading substances. 
B)  cells that protect the body against invaders. 
C)  specific molecules that the body recognizes as foreign. 
D)  enzymes secreted to destroy a pathogen's wall. 
E)  proteins on the surface of our cells that pathogens attach to. 
A)  proteins the body produces against invading substances. 
B)  cells that protect the body against invaders. 
C)  specific molecules that the body recognizes as foreign. 
D)  enzymes secreted to destroy a pathogen's wall. 
E)  proteins on the surface of our cells that pathogens attach to.

Question 17

Molecules with a molecular mass less than 5000 daltons can become antigens when they bind to carrier molecules.

Accepted Answer

A) True 
 B)False

Question 18

Which of the following statements about lymphocytes is incorrect?

Accepted Answer

A)  Lymphocytes have integral surface glycoproteins by which they can be recognized. 
B)  Once they are mature, they migrate to the bone marrow. 
C)  The glycoproteins on the surface of a lymphocyte are designated with the prefix CD, for cluster of differentiation. 
D)  B and T lymphocytes cannot be differentiated under the microscope. 
E)  There are 250 types of CD molecules, some of which are present on lymphocytes. 
A)  Lymphocytes have integral surface glycoproteins by which they can be recognized. 
B)  Once they are mature, they migrate to the bone marrow. 
C)  The glycoproteins on the surface of a lymphocyte are designated with the prefix CD, for cluster of differentiation. 
D)  B and T lymphocytes cannot be differentiated under the microscope. 
E)  There are 250 types of CD molecules, some of which are present on lymphocytes.

Question 19

What type of immunity is produced by the body when a person receives a vaccine?

Accepted Answer

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

Question 20

The body recognizes antigens by the three- dimensional shapes of regions known as .

Accepted Answer

antigenic

Exam 16: Adaptive Immunity

The variable regions from the light and heavy chains of an antibody combine to form .

is required for helper T cells to bind antigen.

Which of the following statements concerning adaptive immunity is incorrect?

A single B lymphocyte can recognize multiple antigenic determinants.

The major histocompatibility antigens are coded for by genes on which chromosome number?

Humoral immunity is mediated by membrane- bound proteins and cytokines.

An invading bacterial cell would be a source of which of the following?

Which of the following statements concerning plasma cells is incorrect?

What are the steps involved in B cell activation?

Which of the following statements about T lymphocytes is incorrect?

Experiments in which tissue was transferred from one animal to another led to tdhiescovery of _ antigen

The ability of the body to recognize its own antigens is called .

The designation "B" for B lymphocytes comes from

When a T cell's CD95L binds to the CD95 on a target cell, apoptosis is triggered.

The humoral immune response is attributed to the action of

Antigens are

Molecules with a molecular mass less than 5000 daltons can become antigens when they bind to carrier molecules.

Which of the following statements about lymphocytes is incorrect?

What type of immunity is produced by the body when a person receives a vaccine?

The body recognizes antigens by the three- dimensional shapes of regions known as .

A Brief History of Microbiology

The Chemistry of Microbiology

Cell Structure and Function

Microscopy, Staining, and Classification

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Controlling Microbial Growth in the Environment

Controlling Microbial Growth in the Body: Antimicrobial Drugs

Characterizing and Classifying Prokaryotes

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Characterizing and Classifying Viruses, Viroids, and Prions

Infection, Infectious Diseases, and Epidemiology

Innate Immunity

Immunization and Immune Testing

Aids and Other Immune Disorders

Microbial Diseases of the Skin and Wounds

Microbial Diseases of the Nervous System and Eyes

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