81. Cells that process antigen and present antigens to other : 1380553

81. Cells that process antigen and present antigens to other : 1380553.

 

81.  Cells that process antigen and present antigens to other immune cells are called  
A.  plasma cells.
B.  antigen-presenting cells.
C.  B receptor cells.
D.  T suppressor cells.
E.  antibodies.

82.  Frequently, several different signals or molecules are needed in order to produce an immune response by a B cell or T cell. The second signal in this process is called  
A.  opsonization.
B.  copresentation.
C.  complement activation.
D.  antigen processing.
E.  costimulation.

83.  Which of the following cytokines is mismatched?  
A.  perforin – makes a hole in target cell membranes
B.  alpha interferon – prevents viral replication
C.  lymphotoxin – costimulator of T cells
D.  interleukin 4 – plays a role in allergic reactions
E.  TNF – activates macrophages and promotes fever

84.  T helper cells possess a glycoprotein called CD4. This molecule binds to  
A.  MHC class I molecules.
B.  MHC class II molecules.
C.  MHC-CD8 antigens.
D.  MHC-CD28 antigens.
E.  Interleukin-1 receptor.

85.  Which of the following might occur after a helper T cell is presented with a processed antigen and costimulated?  
A.  Helper T cells destroy the presenting cell.
B.  Helper T cells produce antibodies.
C.  Helper T cells release interleukins that stimulate B cells to clone.
D.  Helper T cells stop division.
E.  Helper T cells lyse.

86.  Lymphocyte proliferation begins by increasing the number of  
A.  macrophages.
B.  B cells.
C.  T suppressor cells.
D.  helper T cells.
E.  cytotoxic T cells.

87.  Once cytotoxic T cells are produced, which of the following is (are) consistent with their ability to attack intracellular viruses?  
A.  Most nucleated cells process antigens through the MHC class I mechanisms.
B.  Viral antigens are processed by the MHC class I mechanism and are presented to the cell surface.
C.  Cytotoxic T cells bind to MHC class I processed antigens.
D.  Cytotoxic T cells bound to the MHC class I processed antigens release lymphokines.
E.  All of these choices are correct.

88.  Tolerance is a state of  
A.  hypersensitivity.
B.  transplant rejection.
C.  unresponsiveness to antigens.
D.  responding to self-antigens.
E.  non-recognition of antigens.

89.  Tolerance to antigens is induced by  
A.  blocking costimulation.
B.  stimulating interleukin 2 production.
C.  preventing suppressor T cell proliferation.
D.  promoting the release of cytokines.
E.  stimulating helper T cell division.

90. Antibodies are produced by 
A. cytotoxic T cells stimulated by helper T cells.
B. helper T cells stimulated by various cytokines.
C. B cells that differentiate to form plasma cells.
D. natural killer cells as they lyse cancer cells.
E. the red bone marrow.

 

 

81. Cells that process antigen and present antigens to other : 1380553

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