Question 1

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.

Question 2

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

Accepted Answer

A) True 
 B)False

Question 3

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

Accepted Answer

A) True 
 B)False

Question 4

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

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

Question 6

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

Accepted Answer

antigen- b...

Question 7

The humoral immune response is attributed to the action of

Accepted Answer

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

Question 8

is required for helper T cells to bind antigen.

Accepted Answer

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

Question 9

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

Accepted Answer

antigenic ...

Question 10

What are the steps involved in B cell activation?

Accepted Answer

B cell activation involves many steps. F...

Question 11

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

Accepted Answer

major hist...

Question 12

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.

Question 13

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 14

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

Question 15

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.

Question 16

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 17

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.

Question 18

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.

Question 19

A single B lymphocyte can recognize multiple antigenic determinants.

Accepted Answer

A) True 
 B)False

Question 20

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.

Exam 16: Adaptive Immunity

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

Correct Answerverifiedmajor hist...View AnswerShow Answer

The humoral immune response is attributed to the action of

Correct AnswerverifiedShow Answer

Which of the following statements concerning adaptive immunity is incorrect?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The designation "B" for B lymphocytes comes from

Correct AnswerverifiedShow Answer

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

Correct Answerverifiedantigen- b...View AnswerShow Answer

Antigens are

Correct AnswerverifiedShow Answer

is required for helper T cells to bind antigen.

Correct AnswerverifiedShow Answer

Which of the following statements about T lymphocytes is incorrect?

Correct AnswerverifiedShow Answer

Which of the following statements about lymphocytes is incorrect?

Correct AnswerverifiedShow Answer

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

Correct Answerverifiedantigenic ...View AnswerShow Answer

A single B lymphocyte can recognize multiple antigenic determinants.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following statements concerning plasma cells is incorrect?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

What are the steps involved in B cell activation?

Correct AnswerverifiedB cell activation involves many steps. F...View AnswerShow Answer

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major hist...
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antigen- b...
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antigenic ...
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B cell activation involves many steps. F...
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