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Multiple Choice Quiz
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1
Which of the following statements does not correctly describe antibodies?
A)Antibodies are secreted by plasma cells.
B)Antibodies protect against viruses by binding to them and presenting them to phagocytes.
C)Antibodies protect against viruses by binding to them and neutralizing them.
D)Antibodies activate complement.
E)Antibodies protect against viruses by binding to them and perforating them.
2
Which of the following statements regarding B cells is not true?
A)can act as antigen-presenting cells.
B)can secrete interleukin 1.
C)activation requires class 1 proteins
D)are activated by cytokines.
E)usually require T cells to be activated for B-cell activation.
3
Antibodies against both type A and type B antigens are found in the plasma of a person whose blood type is
A)type A.
B)type B.
C)type AB.
D)type O.
E)none of the above.
4
Which of the following people may suffer from a type of hemolytic anemia called erythroblastosis fetalis?
A)an Rh+ fetus with an Rh- mother.
B)an Rh- woman who is pregnant with an Rh+ fetus.
C)an Rh- fetus with an Rh+ mother.
D)an Rh+ woman who is pregnant with an Rh- fetus.
E)an Rh- man who fathers an Rh+ fetus.
5
Chemotaxis
A)refers to the chemical attraction of erythrocytes to the site of inflammation.
B)brings neutrophils and monocytes to the scene of microbial invasion or injury.
C)recruits macrophages.
D)A and B.
E)B and C.
6
Which of the following statements regarding phagocytes and phagocytosis is true?
A)Macrophages, monocytes and mast cells are phagocytes.
B)Contact of phagocytes with microbes stimulates the phagocytes to release chemicals that stimulate the inflammatory response.
C)Phagocytosis is stimulated by the presence of proteins called rhodopsins.
D)A and B.
E)A, B and C.
7
Which of the following statements regarding phagocytosis is true?
A)Macrophages are the only phagocytes in the tissues.
B)The microbe engulfed by the phagocyte is killed by lysosomal enzymes and hydrogen peroxide.
C)Phagocytosis is controlled by a negative feedback mechanism whereby phagocytes release chemicals that inhibit further phagocytosis.
D)The microbe engulfed by the phagocyte is killed by the membrane attack complex (MAC).
E)None of the above statements is true.
8
B and T cells are preprogrammed to recognize specific antigens.
A)True
B)False
9
The two broad categories of specific immune responses are antibody-mediated and humoral.
A)True
B)False
10
In cell-mediated immune responses, immune cells directly kill antigen-bearing cells.
A)True
B)False
11
Cytotoxic T cells kill body cells by phagocytosis.
A)True
B)False





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