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Which of the following health problems are likely to occur if a person is unable to form the IgE antibodies?


A) The person would have problems defending themselves against parasitic worm infections as well as lacking an immediate allergic response.
B) The person would be unable to activate the complement.
C) Pathogens would be able to attach to their epithelial cells much easier.
D) They would be unable to have their cells clump.
E) Their B cells would be unable to respond to antigens.

F) A) and B)
G) C) and D)

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A person who is blood type AB has


A) only antigen A on the surface of RBCs.
B) only antigen B on the surface of RBCs.
C) antigens A and B on the surface of RBCs.
D) antibodies A and B on the surface of RBCs.
E) only antibody A on the surface of RBCs.

F) A) and E)
G) None of the above

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Which portion of the antibody binds to the antigen?


A) variable region
B) constant region
C) heavy chain
D) light chain

E) None of the above
F) B) and C)

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A

Cytokines may be used in the treatment of cancer and AIDS because they stimulate white blood cell formation and/or function.

A) True
B) False

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The clonal selection theory states that


A) all B cells are exact clones of one another.
B) all T cells are exact clones of one another.
C) when a B or T cell is activated by binding to/recognizing an antigen, then that cell will be cloned into cells that recognize the same antigen.
D) when a B or T cell is stimulated by encountering the correct antibody, it divides to form a clone of cells that will respond to the same antibody.
E) T cells are stimulated by B cells to divide and form plasma cells, which secrete antibodies.

F) D) and E)
G) All of the above

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Describe the three major functions of the lymphatic system.

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1. Lymphatic capillaries absorb excess t...

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When a person is bitten by a venomous snake, receiving blood plasma from another person who recently survived the same type of snake bite would provide passive immunity.

A) True
B) False

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What is the major drawback to cytokine therapies?


A) Side effects can be life-threatening.
B) The therapies are still untested.
C) The treatments are very expensive.
D) The therapies only work for women.
E) The therapies only work for men.

F) A) and B)
G) A) and C)

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List the function of the following antibodies: IgG, IgM, IgA, IgD, and IgE.

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IgG: binds to pathogens, activates compl...

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A person without a spleen


A) cannot survive.
B) cannot synthesize red blood cells.
C) cannot synthesize white blood cells.
D) may need antibiotic therapy.
E) may need blood transfusions to prevent anemia.

F) B) and E)
G) B) and D)

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Which of the following lymphoid organs is largest during a person's childhood but shrinks in adulthood?


A) tonsils
B) lymph nodes
C) spleen
D) bone marrow
E) thymus

F) B) and C)
G) A) and E)

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Which of the following statement(s) is/are correct about the lymphatic system?


A) The lymphatic system protects the body from disease.
B) The lymphatic system returns excess tissue fluid to the bloodstream.
C) The fluid inside lymphatic vessels is called lymph.
D) The lymphatic system absorbs fats at the villi and transports them to the bloodstream.
E) All of the answer choices correctly describe the lymphatic system.

F) A) and C)
G) B) and E)

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Lymph is


A) excreted by the kidneys.
B) returned to the circulatory system via arteries.
C) returned to the circulatory system via the subclavian veins.
D) absorbed by tissues.
E) excreted as sweat.

F) C) and E)
G) A) and B)

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Elephantiasis is a tropical disease where small nematode larvae block the lymphatic ducts. As a result, the legs become large like those of an elephant and the scrotum and arms may also swell. This problem would be a severe form of


A) hemorrhoids.
B) phlebitis.
C) anemia.
D) angina.
E) edema.

F) All of the above
G) A) and C)

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In the movie Bubble Boy, Jimmy lives inside a plastic bubble where he is protected from all outside agents. Which type of disease would require a child to live inside a plastic bubble?


A) an autoimmune disease
B) systemic lupus erythematosus
C) multiple sclerosis
D) AIDS
E) SCID

F) B) and C)
G) A) and B)

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E

An antibody molecule


A) will either consist of a constant region or a variable region.
B) forms an X-shaped protein molecule.
C) contains an antigen-binding site on each arm.
D) contains four light chains and two heavy chains.
E) contains constant regions that bind to the antigen.

F) B) and C)
G) A) and E)

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C

Most antibodies found in the blood belong to what class of immunoglobulins?


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

F) All of the above
G) A) and E)

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The thoracic duct will drain the abdomen.

A) True
B) False

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Which of the following is true about the clonal selection theory?


A) An antigen selects certain B cells to produce a clone of plasma cells.
B) An antibody stimulates the multiplication of B cell antigens against it.
C) T cells select those B cells that should produce antibodies, regardless of antigens.
D) T cells suppress all the B cells except the ones that should multiply and divide.
E) One B cell will give rise to plasma cells that produce antibodies against several antigens.

F) B) and D)
G) B) and C)

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The primary target of the HIV virus is


A) helper T cells.
B) suppressor T cells.
C) cytotoxic T cells.
D) memory T cells.
E) B cells.

F) A) and C)
G) B) and D)

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