Question 1

Place the steps of bacterial antigen processing and presentation in the correct order. 
1. Lysosomal enzymes digest the bacterium into molecular bits.
2. The antigen - MHC complex is displayed on the cell surface.
3. The endocytic vesicle fuses with a lysosome.
4. A bacterium is engulfed by a phagocytic cell.

Accepted Answer

A)   4-3-1-2
B)   4-3-2-1
C)   3-4-2-1
D)   2-4-3-1E) All of the above
F) None of the above

Question 2

If a person is incapable of making effector helper T cells, what will be the result?

Accepted Answer

A)   Antibodies will not be produced.
B)   Effector B cells will not be produced.
C)   Memory B cells will not be produced.
D)   Complement cascade will not occur.
E)   Memory and effector B cells will not be produced.F) B) and E)
G) A) and E)

Question 3

How are humans able to produce billions of unique B and T cell receptors?

Accepted Answer

A)   Each time a pathogen is encountered, a new receptor is produced.
B)   The two different genes that encode receptor proteins allow for many versions of receptors to be produced.
C)   Random splicing of gene segments encoding receptor proteins allows for 2.5 billion potential combinations.
D)   Antigen - presenting cells stimulate B and T cells to each produce billions of receptor molecules.
E)   There are billions of B and T cells, each of which produces a single receptor on its cell surface.F) B) and D)
G) None of the above

Question 4

Inflammation, complement proteins, and phagocytes are part of ____ immunity.

Accepted Answer

A)   adaptive
B)   innate
C)   antibody-mediated
D)   cell-mediated
E)   surface barrierF) B) and E)
G) B) and D)

Question 5

The goal of immunization is to ____.

Accepted Answer

A)   limit the amount of time a person is ill with a disease
B)   induce immunity to disease
C)   enable infected individuals to recover from specific diseases
D)   expose individuals to a disease
E)   elicit an allergic responseF) None of the above
G) A) and C)

Question 6

The antibody-mediated immune response is most effective against ____.

Accepted Answer

A)   cancer cells
B)   viral infected cells
C)   bacteria circulating in the blood
D)   normal flora
E)   self-cellsF) C) and E)
G) B) and D)

Question 7

Antibody molecules ____.

Accepted Answer

A)   are secreted by B cells and T cells
B)   stay attached to the B cell membrane as B cell receptors
C)   inactivate complement proteins
D)   prevent phagocytosis
E)   can each bind to many different antigensF) A) and B)
G) A) and C)

Question 8

Which of the following is a phagocyte that acts to alert the adaptive immune system of the presence of antigen in solid tissue?

Accepted Answer

A)   macrophages
B)   monocytes
C)   neutrophils
D)   dendritic cells
E)   eosinophilsF) None of the above
G) A) and B) D

Question 9

White blood cells that patrol interstitial fluid, phagocytize almost everything except uninjured body cells, and secrete cytokines to alert the adaptive immune system to threats are known as ____.

Accepted Answer

A)   neutrophils
B)   macrophages
C)   T lymphocytes
D)   dendritic cells
E)   eosinophilsF) None of the above
G) A) and E)

Question 10

Once a stimulus for inflammation subsides, ____ produce compounds that suppress inflammation and promote healing.

Accepted Answer

A)   neutrophils
B)   macrophages
C)   dendritic cells
D)   T lymphocytes
E)   monocytesF) C) and D)
G) A) and B)

Question 11

T cells will begin to secrete cytokines when bound to a(n)  ____.

Accepted Answer

A)   MHC - antigen complex
B)   receptor - antigen complex
C)   antigen directly bound to the surface of a transport vesicle
D)   antigen - antibody complex
E)   bacterial pathogenF) B) and E)
G) C) and D) A

Question 12

____ patrol the blood and develop into phagocytic ____ that patrol tissues and interstitial fluid.

Accepted Answer

A)   Macrophages; neutrophils
B)   Neutrophils; macrophages
C)   Dendritic cells; macrophages
D)   Monocytes; macrophages
E)   Monocytes; dendritic cellsF) A) and D)
G) A) and C)

Question 13

Acne results when bacterial secretions ____.

Accepted Answer

A)   leak into internal tissues of follicles and cause inflammation
B)   flow into open skin wounds
C)   are swallowed and activate the innate immune response
D)   mix with sweat and become more acidic.
E)   are phagocytized by macrophagesF) A) and E)
G) B) and C)

Question 14

Antigen bearing particles in the blood travel to the ____, while those in solid tissues travel to the ____.

Accepted Answer

A)   spleen; bone marrow
B)   thymus; bone marrow
C)   spleen; lymph nodes
D)   lymph nodes; spleen
E)   bone marrow; thymusF) A) and E)
G) All of the above

Question 15

The cell-mediated immune response is most effective against ____.

Accepted Answer

A)   cancer cells only
B)   viral-infected cells only
C)   bacteria circulating in the blood
D)   both cancer cells and viral infected cells
E)   normal floraF) None of the above
G) A) and E) D

Question 16

Complement proteins ____.

Accepted Answer

A)   prevent pathogens from entering the interior environment of the body
B)   bore channels in targeted cells, causing them to burst
C)   inactivate other complement proteins
D)   bind to pathogens making them a target for antibodies
E)   destroy healthy body cells as well as invading microorganismsF) C) and E)
G) B) and C)

Question 17

Since HIV attacks T cells, which type of immunity is affected in HIV-infected individuals?

Accepted Answer

A)   innate
B)   antibody-mediated
C)   cell-mediated
D)   inflammation
E)   complementF) C) and D)
G) A) and B)

Question 18

Smallpox ____.

Accepted Answer

A)   was the target of the first vaccine
B)   is spread by infected cattle
C)   is only found in subtropical climates
D)   was eradicated by 1850
E)   is unrelated to cowpoxF) C) and E)
G) B) and E)

Question 19

Immunity ____.

Accepted Answer

A)   is always adaptive
B)   is an organism ' s ability to resist and combat infections
C)   evolved after the emergence of multicellular organisms
D)   is only found in mammals
E)   is not specific for any given pathogenF) D) and E)
G) A) and B)

Question 20

Place the following events of an inflammatory event in response to bacterial infection in proper order. 1. Activated complement binds to bacteria.
2)  Capillary permeability increases.
3)  Phagocytes engulf bacteria.
4)  Mast cell receptors bind to bacterial antigens.
5)  Signaling molecules cause arterioles to widen.

Accepted Answer

A)   4-5-2-1-3
B)   4-3-1-2-5
C)   5-2-1-4-3
D)   1-3-4-2-5
E)   5-2-4-1-3F) A) and D)
G) A) and C)

Exam 23: Immunity

Correct Answer
verified

If a person is incapable of making effector helper T cells, what will be the result?

Correct Answer
verified

How are humans able to produce billions of unique B and T cell receptors?

Correct Answer
verified

Inflammation, complement proteins, and phagocytes are part of ____ immunity.

Correct Answer
verified

The goal of immunization is to ____.

Correct Answer
verified

The antibody-mediated immune response is most effective against ____.

Correct Answer
verified

Antibody molecules ____.

Correct Answer
verified

Which of the following is a phagocyte that acts to alert the adaptive immune system of the presence of antigen in solid tissue?

Correct Answer
verified
D

White blood cells that patrol interstitial fluid, phagocytize almost everything except uninjured body cells, and secrete cytokines to alert the adaptive immune system to threats are known as ____.

Correct Answer
verified

Once a stimulus for inflammation subsides, ____ produce compounds that suppress inflammation and promote healing.

Correct Answer
verified

T cells will begin to secrete cytokines when bound to a(n) ____.

Correct Answer
verified
A

patrol the blood and develop into phagocytic that patrol tissues and interstitial fluid.

Correct Answer
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Acne results when bacterial secretions ____.

Correct Answer
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Antigen bearing particles in the blood travel to the , while those in solid tissues travel to the .

Correct Answer
verified

The cell-mediated immune response is most effective against ____.

Correct Answer
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D

Complement proteins ____.

Correct Answer
verified

Since HIV attacks T cells, which type of immunity is affected in HIV-infected individuals?

Correct Answer
verified

Smallpox ____.

Correct Answer
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Immunity ____.

Correct Answer
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Correct Answer
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Exam 23: Immunity

Correct AnswerverifiedShow Answer

If a person is incapable of making effector helper T cells, what will be the result?

Correct AnswerverifiedShow Answer

How are humans able to produce billions of unique B and T cell receptors?

Correct AnswerverifiedShow Answer

Inflammation, complement proteins, and phagocytes are part of ____ immunity.

Correct AnswerverifiedShow Answer

The goal of immunization is to ____.

Correct AnswerverifiedShow Answer

The antibody-mediated immune response is most effective against ____.

Correct AnswerverifiedShow Answer

Antibody molecules ____.

Correct AnswerverifiedShow Answer

Which of the following is a phagocyte that acts to alert the adaptive immune system of the presence of antigen in solid tissue?

Correct AnswerverifiedD

White blood cells that patrol interstitial fluid, phagocytize almost everything except uninjured body cells, and secrete cytokines to alert the adaptive immune system to threats are known as ____.

Correct AnswerverifiedShow Answer

Once a stimulus for inflammation subsides, ____ produce compounds that suppress inflammation and promote healing.

Correct AnswerverifiedShow Answer

T cells will begin to secrete cytokines when bound to a(n) ____.

Correct AnswerverifiedA

____ patrol the blood and develop into phagocytic ____ that patrol tissues and interstitial fluid.

Correct AnswerverifiedShow Answer

Acne results when bacterial secretions ____.

Correct AnswerverifiedShow Answer

Antigen bearing particles in the blood travel to the ____, while those in solid tissues travel to the ____.

Correct AnswerverifiedShow Answer

The cell-mediated immune response is most effective against ____.

Correct AnswerverifiedD

Complement proteins ____.

Correct AnswerverifiedShow Answer

Since HIV attacks T cells, which type of immunity is affected in HIV-infected individuals?

Correct AnswerverifiedShow Answer

Smallpox ____.

Correct AnswerverifiedShow Answer

Immunity ____.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

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D

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A

patrol the blood and develop into phagocytic that patrol tissues and interstitial fluid.

Correct Answer
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Correct Answer
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Antigen bearing particles in the blood travel to the , while those in solid tissues travel to the .

Correct Answer
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D

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Correct Answer
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Correct Answer
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