Question 1

If T-lymphocytes that failed the negative selection test were not destroyed, the immune system would likely

Accepted Answer

A)   cause autoimmune disorders.
B)   exhibit very delayed activity.
C)   be unable to recognize a particular class of pathogen.
D)   exhibit more negative membrane potentials.E) B) and C)
F) A) and D)

Question 2

The inflammatory response includes a decrease in the permeability of capillaries to prevent excessive blood loss after injury.

Accepted Answer

A) True 
 B)False

Question 3

The function of helper T-lymphocytes is to

Accepted Answer

A)   initiate and oversee the immune response.
B)   turn off the immune response once it has been activated.
C)   secrete toxins to kill or disable pathogens.
D)   trigger cell death by disrupting metabolic activities.
E)   All choices are correct.F) A) and B)
G) A) and C)

Question 4

Agglutination of mismatched blood is a function of

Accepted Answer

A)   IgD, which is a dimer.
B)   IgD, which is a pentamer.
C)   IgM, which is a dimer.
D)   IgM, which is a pentamer.E) A) and D)
F) A) and C)

Question 5

Cytotoxic T-lymphocytes destroy infected cells by

Accepted Answer

A)   increasing the permeability of infected cells and inducing apoptosis.
B)   increasing the permeability of infected cells and preventing apoptosis.
C)   decreasing the permeability of infected cells and inducing apoptosis.
D)   decreasing the permeability of infected cells and preventing apoptosis.E) None of the above
F) A) and B)

Question 6

Eosinophils and lymphocytes are both types of leukocytes.

Accepted Answer

A) True 
 B)False

Question 7

Which is not an action of interferon?

Accepted Answer

A)   It stimulates macrophages and NK cells to destroy virus-infected cells.
B)   It triggers synthesis of enzymes that destroy viral nucleic acids.
C)   It signals the immune system that the secreting cell is part of the body and so should not be attacked.
D)   It binds to receptors of neighboring cells preventing them from being infected.E) C) and D)
F) B) and C)

Question 8

Some biologists have criticized the traditional analogy of the immune system to an army, arguing that it is unnecessarily militaristic. They have proposed other analogies that compare immune functioning to gardening or housekeeping. Develop one of these or create your own analogy for immune function and describe the roles of helper T-lymphocytes, cytotoxic T-lymphocytes, and B-lymphocytes using language that fits your metaphor.

Accepted Answer

Many answers are possible. Helper T-lymp...

Question 9

As T-lymphocytes leave the thymus, they are

Accepted Answer

A)   naive and not yet competent.
B)   naive and immunocompetent.
C)   activated but not yet competent.
D)   activated and immunocompetent.E) C) and D)
F) B) and C)

Question 10

The second signal during B-lymphocyte activation involves stimulation from

Accepted Answer

A)   IL-2 released by cytotoxic T-lymphocytes.
B)   IL-4 released by helper T-lymphocytes.
C)   bradykinin released by antigen-presenting cells.
D)   antibodies released by antigens.E) A) and D)
F) C) and D)

Question 11

MHC class II molecules are loaded with exogenous antigen after the antigen has been digested into fragments within a phagolysosome.

Accepted Answer

A) True 
 B)False

Question 12

Which of the following lists the body's first, second, and third lines of defense in order?

Accepted Answer

A)   Adaptive immunity, external innate immunity, internal immunity
B)   External innate immunity, internal innate immunity, adaptive immunity
C)   External innate immunity, adaptive immunity, internal innate immunity
D)   External adaptive immunity, internal adaptive immunity, innate immunity
E)   Innate immunity, internal adaptive immunity, internal innate immunityF) B) and C)
G) A) and B)

Question 13

A fever ________ reproduction of bacteria and ________ CAMs on the endothelium of capillaries of lymph nodes.

Accepted Answer

A)   stimulates; increases
B)   stimulates; decreases
C)   inhibits; increases
D)   inhibits; decreasesE) C) and D)
F) All of the above

Question 14

Compared to most interstitial fluid in the body, the interstitial fluid of an inflamed area would have a lower osmolarity and a lower concentration of proteins.

Accepted Answer

A) True 
 B)False

Question 15

Which class of chemical messenger facilitates white blood cell formation in bone marrow?

Accepted Answer

A)   Interleukins
B)   Colony-stimulating factors
C)   Tumor necrosis factors
D)   InterferonsE) A) and B)
F) A) and C)

Question 16

When part of the immune system recognizes and binds to a foreign molecule, the part of the molecule to which binding occurs is called the epitope or ________ determinant.

Accepted Answer

The answer of When part of the immune system recognizes...

Question 17

Protozoans are obligate intracellular parasites.

Accepted Answer

A) True 
 B)False

Question 18

"Complement" refers to a group of

Accepted Answer

A)   white blood cells.
B)   antibodies.
C)   plasma proteins.
D)   molecules on the surface of pathogenic microbes.E) All of the above
F) A) and B)

Question 19

Consuming meat that has been infected with a prion can lead to the disease

Accepted Answer

A)   trichomoniasis.
B)   bovine spongiform encephalopathy.
C)   clostridium tetani.
D)   histoplasmosis.E) B) and C)
F) All of the above

Question 20

When an antibody covers the region of a virus that the virus uses to bind to a cell receptor, that covering function is known as ________.

Accepted Answer

The answer of When an antibody covers the region of...

Exam 22: Immune System and the Bodys Defense

The function of helper T-lymphocytes is to

Correct Answer
verified

If T-lymphocytes that failed the negative selection test were not destroyed, the immune system would likely

Correct Answer
verified

As T-lymphocytes leave the thymus, they are

Correct Answer
verified

Protozoans are obligate intracellular parasites.

Correct Answer
verified

MHC class II molecules are loaded with exogenous antigen after the antigen has been digested into fragments within a phagolysosome.

Correct Answer
verified

Consuming meat that has been infected with a prion can lead to the disease

Correct Answer
verified

A fever reproduction of bacteria and CAMs on the endothelium of capillaries of lymph nodes.

Correct Answer
verified

Correct Answer
verified
Many answers are possible. Helper T-lymp...
View Answer

Eosinophils and lymphocytes are both types of leukocytes.

Correct Answer
verified

When part of the immune system recognizes and binds to a foreign molecule, the part of the molecule to which binding occurs is called the epitope or ________ determinant.

Correct Answer
verified

Which class of chemical messenger facilitates white blood cell formation in bone marrow?

Correct Answer
verified

When an antibody covers the region of a virus that the virus uses to bind to a cell receptor, that covering function is known as ________.

Correct Answer
verified

"Complement" refers to a group of

Correct Answer
verified

The inflammatory response includes a decrease in the permeability of capillaries to prevent excessive blood loss after injury.

Correct Answer
verified

Cytotoxic T-lymphocytes destroy infected cells by

Correct Answer
verified

The second signal during B-lymphocyte activation involves stimulation from

Correct Answer
verified

Agglutination of mismatched blood is a function of

Correct Answer
verified

Which is not an action of interferon?

Correct Answer
verified

Compared to most interstitial fluid in the body, the interstitial fluid of an inflamed area would have a lower osmolarity and a lower concentration of proteins.

Correct Answer
verified

Which of the following lists the body's first, second, and third lines of defense in order?

Correct Answer
verified

Exam 22: Immune System and the Bodys Defense

The function of helper T-lymphocytes is to

Correct AnswerverifiedShow Answer

If T-lymphocytes that failed the negative selection test were not destroyed, the immune system would likely

Correct AnswerverifiedShow Answer

As T-lymphocytes leave the thymus, they are

Correct AnswerverifiedShow Answer

Protozoans are obligate intracellular parasites.

Correct AnswerverifiedShow Answer

MHC class II molecules are loaded with exogenous antigen after the antigen has been digested into fragments within a phagolysosome.

Correct AnswerverifiedShow Answer

Consuming meat that has been infected with a prion can lead to the disease

Correct AnswerverifiedShow Answer

A fever ________ reproduction of bacteria and ________ CAMs on the endothelium of capillaries of lymph nodes.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedMany answers are possible. Helper T-lymp...View AnswerShow Answer

Eosinophils and lymphocytes are both types of leukocytes.

Correct AnswerverifiedShow Answer

When part of the immune system recognizes and binds to a foreign molecule, the part of the molecule to which binding occurs is called the epitope or ________ determinant.

Correct AnswerverifiedShow Answer

Which class of chemical messenger facilitates white blood cell formation in bone marrow?

Correct AnswerverifiedShow Answer

When an antibody covers the region of a virus that the virus uses to bind to a cell receptor, that covering function is known as ________.

Correct AnswerverifiedShow Answer

"Complement" refers to a group of

Correct AnswerverifiedShow Answer

The inflammatory response includes a decrease in the permeability of capillaries to prevent excessive blood loss after injury.

Correct AnswerverifiedShow Answer

Cytotoxic T-lymphocytes destroy infected cells by

Correct AnswerverifiedShow Answer

The second signal during B-lymphocyte activation involves stimulation from

Correct AnswerverifiedShow Answer

Agglutination of mismatched blood is a function of

Correct AnswerverifiedShow Answer

Which is not an action of interferon?

Correct AnswerverifiedShow Answer

Compared to most interstitial fluid in the body, the interstitial fluid of an inflamed area would have a lower osmolarity and a lower concentration of proteins.

Correct AnswerverifiedShow Answer

Which of the following lists the body's first, second, and third lines of defense in order?

Correct AnswerverifiedShow Answer

Correct Answer
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Correct Answer
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Correct Answer
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verified

A fever reproduction of bacteria and CAMs on the endothelium of capillaries of lymph nodes.

Correct Answer
verified

Correct Answer
verified
Many answers are possible. Helper T-lymp...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
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Correct Answer
verified

Correct Answer
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Correct Answer
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Correct Answer
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