Question 1

MHC molecules are found on all of the following cells except

Accepted Answer

A)  leukocytes.
B)  eosinophils.
C)  epithelial cells.
D)  red blood cells.
E)  islet of langerhans cells.F) A) and C)
G) A) and B)

Question 2

T-cell response to T-cell-dependent antigens requires

Accepted Answer

A)  typically a protein antigen.
B)  binding of the T cell to a class II MHC receptor on a macrophage.
C)  binding of the T cell to a site on the antigen.
D)  interleukin-1 activating the T helper cell.
E)  All of the choices are correct.F) A) and C)
G) B) and D) E

Question 3

Antitoxins

Accepted Answer

A)  contain modified bacterial exotoxin molecules.
B)  are always genetically engineered.
C)  contain select antigenic components of a pathogen rather than whole cells or viruses.
D)  confer passive immunity.
E)  utilize DNA strands that will produce the antigen.F) B) and D)
G) B) and C)

Question 4

You have received the first hepatitis A vaccine.It was required for your mission trip to Nicaragua in Central America,where hepatitis A is common.However,you never went back for the booster shot of the vaccine,which should have been received within 6 months of the initial vaccination.What statement accurately reflects your present immunity to this pathogen?

Accepted Answer

A)  This is not a problem because the second dosage is just extra protection.Your immune status would be very high.
B)  The one dosage is not enough because it only activated humoral immunity.The second dosage is to then activate cell-mediated immunity.The combination of the two immune responses gives you 100% coverage of immunity to hepatitis
C)  Not a problem because at any time--in a year,5 years,etc.--you can go get the booster vaccine for hepatitis A and be fully covered by immunity.
D)  You are at risk to get hepatitis A since your immune status is only partial.Not enough immune memory cells were produced since you received one dosage of vaccine,so you are likely to get the disease when exposed to the virus.E) All of the above
F) C) and D)

Question 5

Fluzone is a brand name for a very commonly given influenza vaccine.The vaccine is prepared by first harvesting flu viruses in chicken embryos and then breaking apart virus particles into protein subunits,thereby inactivating the virus.Your friend refuses to get the vaccine.Which of these statements is the only valid reason for her not to get the flu vaccine?

Accepted Answer

A)  She could catch the flu from the inactivated vaccine.
B)  She could pass the virus onto her baby,causing the child to become autistic.
C)  She could die from the vaccine.
D)  She is allergic to eggs.E) B) and C)
F) C) and D)

Question 6

An activated TH cell produces ___,which is a growth factor for T helper cells and cytotoxic T cells.

Accepted Answer

A)  interleukin-1
B)  interleukin-2
C)  interleukin-12
D)  antiserum
E)  complementF) D) and E)
G) A) and B) B

Question 7

The immunoglobulin class that is the only one capable of crossing the placenta is

Accepted Answer

A)  IgA
B)  IgD
C)  IgE
D)  IgG
E)  IgMF) B) and D)
G) A) and E)

Question 8

A foreign molecule that causes a specific immune response is a/an

Accepted Answer

A)  PAMP.
B)  marker.
C)  hapten.
D)  antibody.
E)  antigen.F) D) and E)
G) A) and B)

Question 9

Acellular vaccines and subunit vaccines

Accepted Answer

A)  contain modified bacterial exotoxin molecules.
B)  are always genetically engineered.
C)  contain select antigenic components of a pathogen rather than whole cells or viruses.
D)  confer passive immunity.
E)  utilize DNA strands that will produce the antigen.F) A) and B)
G) B) and C)

Question 10

Helper T cells

Accepted Answer

A)  secrete antibodies.
B)  function in allergic reactions.
C)  directly destroy target cells.
D)  suppress immune reactions.
E)  activate B cells and other T cells.F) B) and E)
G) A) and E)

Question 11

A cytotoxic T lymphocyte,having been activated against a particular viral antigen,"sees" this same antigen on a host body cell.What will happen?

Accepted Answer

A)  The cytotoxic T cell will produce antibodies against the antigen.
B)  The antigen will move inside of the host body cell,thereby hiding from the cytotoxic T cell.
C)  The cytotoxic T cell will produce proteins that cause the host body cell to die.
D)  The cytotoxic body cell will activate B cells which then produce antibody against the antigen.E) A) and B)
F) A) and C)

Question 12

The histocompatibility complex proteins function in

Accepted Answer

A)  recognition of self.
B)  antibody proliferation.
C)  B-cell maturation.
D)  T-cell maturation.E) B) and D)
F) C) and D) A

Question 13

Immunotherapy is the

Accepted Answer

A)  use of antitoxins.
B)  use of immune serum globulin.
C)  conferring of passive immunity.
D)  administering of preformed antibodies.
E)  All of the choices are correct.F) A) and B)
G) A) and C)

Question 14

An example of natural passive immunity would be

Accepted Answer

A)  chickenpox infection,followed by lifelong immunity.
B)  chickenpox vaccine triggering extended immunity to chickenpox.
C)  giving a person immune serum globulins to chickenpox virus after exposure to the disease.
D)  a fetus acquiring maternal IgG to the chickenpox virus across the placenta.E) All of the above
F) B) and C)

Question 15

Which immunoglobulin class/es can fix complement?

Accepted Answer

A)  IgM only
B)  IgG only
C)  IgD only
D)  IgM and IgG
E)  IgE and IgAF) C) and D)
G) A) and C)

Question 16

Acquired specific immunity involves the response of

Accepted Answer

A)  skin barriers.
B)  B and T lymphocytes.
C)  lysozyme.
D)  mucus membranes.
E)  interferon.F) None of the above
G) B) and E)

Question 17

The immunoglobulin/s found on the surface of B cells is/are

Accepted Answer

A)  IgM only.
B)  IgG only.
C)  IgD only.
D)  IgM and IgD.
E)  IgD and IgE.F) C) and D)
G) All of the above

Question 18

An example of natural active immunity would be

Accepted Answer

A)  chickenpox infection,followed by lifelong immunity.
B)  chickenpox vaccine triggering extended immunity to chickenpox.
C)  giving a person immune serum globulins to chickenpox virus after exposure to the disease.
D)  a fetus acquiring maternal IgG to the chickenpox virus across the placenta.E) A) and D)
F) None of the above

Question 19

As an adult who never developed chickenpox infection as a child,you elect to receive the protective vaccine against this pathogen at the age of 35.This vaccine will stimulate:

Accepted Answer

A)  a primary immune response
B)  latency
C)  a secondary immune response
D)  an anamnestic responseE) A) and D)
F) A) and C)

Question 20

One plasma cell will secrete antibodies of various classes,but the antibodies will all have the same specificity.

Accepted Answer

A) True 
 B)False

Exam 15: Host Defenses II: Specific Immunity and Immunization

MHC molecules are found on all of the following cells except

Correct Answer
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T-cell response to T-cell-dependent antigens requires

Correct Answer
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E

Antitoxins

Correct Answer
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An activated T_H cell produces ___,which is a growth factor for T helper cells and cytotoxic T cells.

Correct Answer
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B

The immunoglobulin class that is the only one capable of crossing the placenta is

Correct Answer
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A foreign molecule that causes a specific immune response is a/an

Correct Answer
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Acellular vaccines and subunit vaccines

Correct Answer
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Helper T cells

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A cytotoxic T lymphocyte,having been activated against a particular viral antigen,"sees" this same antigen on a host body cell.What will happen?

Correct Answer
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The histocompatibility complex proteins function in

Correct Answer
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A

Immunotherapy is the

Correct Answer
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An example of natural passive immunity would be

Correct Answer
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Which immunoglobulin class/es can fix complement?

Correct Answer
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Acquired specific immunity involves the response of

Correct Answer
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The immunoglobulin/s found on the surface of B cells is/are

Correct Answer
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An example of natural active immunity would be

Correct Answer
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As an adult who never developed chickenpox infection as a child,you elect to receive the protective vaccine against this pathogen at the age of 35.This vaccine will stimulate:

Correct Answer
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One plasma cell will secrete antibodies of various classes,but the antibodies will all have the same specificity.

Correct Answer
verified

Exam 15: Host Defenses II: Specific Immunity and Immunization

MHC molecules are found on all of the following cells except

Correct AnswerverifiedShow Answer

T-cell response to T-cell-dependent antigens requires

Correct AnswerverifiedE

Antitoxins

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

An activated TH cell produces ___,which is a growth factor for T helper cells and cytotoxic T cells.

Correct AnswerverifiedB

The immunoglobulin class that is the only one capable of crossing the placenta is

Correct AnswerverifiedShow Answer

A foreign molecule that causes a specific immune response is a/an

Correct AnswerverifiedShow Answer

Acellular vaccines and subunit vaccines

Correct AnswerverifiedShow Answer

Helper T cells

Correct AnswerverifiedShow Answer

A cytotoxic T lymphocyte,having been activated against a particular viral antigen,"sees" this same antigen on a host body cell.What will happen?

Correct AnswerverifiedShow Answer

The histocompatibility complex proteins function in

Correct AnswerverifiedA

Immunotherapy is the

Correct AnswerverifiedShow Answer

An example of natural passive immunity would be

Correct AnswerverifiedShow Answer

Which immunoglobulin class/es can fix complement?

Correct AnswerverifiedShow Answer

Acquired specific immunity involves the response of

Correct AnswerverifiedShow Answer

The immunoglobulin/s found on the surface of B cells is/are

Correct AnswerverifiedShow Answer

An example of natural active immunity would be

Correct AnswerverifiedShow Answer

As an adult who never developed chickenpox infection as a child,you elect to receive the protective vaccine against this pathogen at the age of 35.This vaccine will stimulate:

Correct AnswerverifiedShow Answer

One plasma cell will secrete antibodies of various classes,but the antibodies will all have the same specificity.

Correct AnswerverifiedShow Answer

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E

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An activated T_H cell produces ___,which is a growth factor for T helper cells and cytotoxic T cells.

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B

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A

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