Question 1

Which statement is believed to be true concerning Th1 cells?

Accepted Answer

A)   Th1 cells are induced by antigens derived from allergens.
B)   They are induced by antigens derived from cancer cells.
C)   Th1 cells produce IL-4, IL-5, IL-6, and IL-13.
D)   They assist in the development of humoral immunity.

Question 2

The functions of the major histocompatibility complex (MHC) and CD1 molecules are alike because both:

Accepted Answer

A)   Are antigen-presenting molecules.
B)   Bind antigens to antibodies.
C)   Secrete interleukins during the immune process.
D)   Are capable of activating cytotoxic T lymphocytes. A

Question 3

Which T cell controls or limits the immune response to protect the host's own tissues against an autoimmune response?

Accepted Answer

A)   Cytotoxic T cells
B)   Th1 cells
C)   Th2 cells
D)   Regulatory T (Treg)  cells

Question 4

Which primary characteristic is unique for the immune response?

Accepted Answer

A)   The immune response is similar each time it is activated.
B)   The immune response is specific to the antigen that initiates it.
C)   The response to a specific pathogen is short term.
D)   The response is innate, rather than acquired.

Question 5

Match each immunoglobulin with its characteristic or function.Each immunoglobulin can be used only once.
-Mediates many common allergic responses

Accepted Answer

A)  IgA
B)  IgE
C)  IgG

Question 6

Which immunoglobulin is present in blood,saliva,breast milk,and respiratory secretions?

Accepted Answer

A)   IgA
B)   IgE
C)   IgG
D)   IgM

Question 7

Which statements are true concerning the humoral immune response? (Select all that apply.)

Accepted Answer

A)   The humoral immune response is divided into major and minor phases.
B)   The response has IgG and IgM produced during each of its phrases.
C)   It has a greater presence of IgG than IgM in one of its phases.
D)   The humoral immune response is produced in reaction to the presence of an antigen.
E)   Phases differ in their response time as a result of the effect of memory cells.

Question 8

Which statement is true concerning the IgM?

Accepted Answer

A)   IgM is the first antibody produced during the initial response to an antigen.
B)   IgM mediates many common allergic responses.
C)   IgM is the most abundant class of immunoglobulins.
D)   IgM is capable of crossing the human placenta.

Question 9

When a person is exposed to most antigens,antibodies can be usually detected in his or her circulation within:

Accepted Answer

A)   12 hours
B)   24 hours
C)   3 days
D)   6 days

Question 10

Which cytokine is needed for the maturation of a functional helper T cell?

Accepted Answer

A)   IL-1
B)   IL-2
C)   IL-4
D)   IL-12

Question 11

Which statement is true concerning clonal selection?

Accepted Answer

A)   Clonal selection is driven by hormones and does not require foreign antigens.
B)   This theory involves antigens that select those lymphocytes with compatible receptors.
C)   Clonal selection takes place in the primary (central)  lymphoid organs.
D)   This process generates immature but immunocompetent T and B cells with receptors.

Question 12

How does the aging process of the T-cell activity affect older adults?

Accepted Answer

A)   Poor heat regulation abilities
B)   Increased risk for bone fractures
C)   Tendency to develop various infections
D)   Likelihood of experiencing benign skin lesions

Question 13

Antibodies that are associated with mucosal immune system,such as immunoglobulins,function to prevent which type of infections?

Accepted Answer

A)   Infections that attack the respiratory system
B)   Infections that tend to be chronic in nature
C)   Infections likely to be resistant to antibiotics
D)   Infections that focus on epithelial surfaces of the body

Question 14

Which cell has the ability to recognize antigens presented by the MHC class I molecules?

Accepted Answer

A)   T cytotoxic
B)   CD 4
C)   CD 8
D)   T helper

Question 15

Th2 cells produce IL-4 and suppress which cells?

Accepted Answer

A)   B lymphocytes
B)   Cytotoxic T lymphocytes
C)   Th1 cells
D)   Memory T lymphocytes

Question 16

Which is an example of an endogenous antigen?

Accepted Answer

A)   Yeast
B)   Cancer cells
C)   Bacteria
D)   Fungus B

Question 17

Why is the herpes virus inaccessible to antibodies after the initial infection?

Accepted Answer

A)   The virus does not circulate in the blood.
B)   It does not have antibody receptors.
C)   It resists agglutination.
D)   The virus is a soluble antigen.

Question 18

CD4 is a characteristic surface marker and a result of which of the following? (Select all that apply.)

Accepted Answer

A)   Activity in the primary lymphoid organs
B)   Process of cellular differentiation
C)   Alterations to T cells
D)   Changes to B cells
E)   Clonal selection A,B,C,D

Question 19

Which statement is true regarding maternal antibodies provided to the neonate?

Accepted Answer

A)   The antibodies enter into the fetal circulation by means of active transport.
B)   The antibodies are transferred to the fetus via the lymphatic system.
C)   The antibodies are directly related to the mother's nutritional intake.
D)   The antibodies reach protective levels after approximately 6 months of age.

Question 20

The portion of the antigen that is configured for recognition and binding is referred to as what type of determinant?

Accepted Answer

A)   Immunotope
B)   Paratope
C)   Epitope
D)   Antigenitope

Exam 8: Adaptive Immunity

Which statement is believed to be true concerning Th1 cells?

Correct AnswerverifiedShow Answer

The functions of the major histocompatibility complex (MHC) and CD1 molecules are alike because both:

Correct AnswerverifiedA

Which T cell controls or limits the immune response to protect the host's own tissues against an autoimmune response?

Correct AnswerverifiedShow Answer

Which primary characteristic is unique for the immune response?

Correct AnswerverifiedShow Answer

Match each immunoglobulin with its characteristic or function.Each immunoglobulin can be used only once. -Mediates many common allergic responses

Correct AnswerverifiedShow Answer

Which immunoglobulin is present in blood,saliva,breast milk,and respiratory secretions?

Correct AnswerverifiedShow Answer

Which statements are true concerning the humoral immune response? (Select all that apply.)

Correct AnswerverifiedShow Answer

Which statement is true concerning the IgM?

Correct AnswerverifiedShow Answer

When a person is exposed to most antigens,antibodies can be usually detected in his or her circulation within:

Correct AnswerverifiedShow Answer

Which cytokine is needed for the maturation of a functional helper T cell?

Correct AnswerverifiedShow Answer

Which statement is true concerning clonal selection?

Correct AnswerverifiedShow Answer

How does the aging process of the T-cell activity affect older adults?

Correct AnswerverifiedShow Answer

Antibodies that are associated with mucosal immune system,such as immunoglobulins,function to prevent which type of infections?

Correct AnswerverifiedShow Answer

Which cell has the ability to recognize antigens presented by the MHC class I molecules?

Correct AnswerverifiedShow Answer

Th2 cells produce IL-4 and suppress which cells?

Correct AnswerverifiedShow Answer

Which is an example of an endogenous antigen?

Correct AnswerverifiedB

Why is the herpes virus inaccessible to antibodies after the initial infection?

Correct AnswerverifiedShow Answer

CD4 is a characteristic surface marker and a result of which of the following? (Select all that apply.)

Correct AnswerverifiedA,B,C,D

Which statement is true regarding maternal antibodies provided to the neonate?

Correct AnswerverifiedShow Answer

The portion of the antigen that is configured for recognition and binding is referred to as what type of determinant?

Correct AnswerverifiedShow Answer

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A

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B

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A,B,C,D

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