- 43) ADCC is a process that is most effective in destroyingA) eukaryotic pathogens.B) virus-infected host cells.C) extracellular viruses. D) bacterial pathogens.E) bacterial toxins.
- 33) The presence of which of the following indicates a current infection rather than a previous infection or vaccination?A) IgAB) IgGC) IgMD) IgDE) IgE
- 32) Which of the following bacterial components would most likely result in B cell stimulation by T-independent antigens?A) capsuleB) flagellumC) piliD) ribosomeE) plasmid
- 44) IL-2, produced by TH cells,A) activates macrophages.B) stimulates TH cell maturation.C) causes phagocytosis.D) activates antigen-presenting cells.E) activates TC cells to CTLs.
- 35) The following events occur in cellular immunity. What is the third step?A) Antibodies are produced.B) Dendritic cell takes up antigen.C) Antigen enters M cell.D) TH cell produces cytokines.E) TH cells proliferate.
- 7) Plasma cells will eventually differentiate into memory cells.
- 8) Memory cells do not require B cell receptors.
- Figure 17.1 21) In Figure 17.1, which letter on the graph indicates the patient's secondary response to an antigen?A) aB) bC) cD) dE) e
- 39) Thymic selectionA) destroys T cells that do not recognize self-molecules of MHC.B) destroys B cells that make antibodies against self.C) destroys MHC molecules.D) destroys CD4+ cells that attack self.E) activates B cells.
- 37) Which one of the following causes transmembrane channels in target cells?A) granzymesB) haptenC) IL-1D) IL-2E) perforin
- 45) Which of the following statements about IL-12 is FALSE?A) It activates macrophages.B) It inhibits some tumor cells.C) It activates the TH1 pathway.D) It causes autoimmune diseases.E) It causes TH cells to respond to HIV.
- 40) Which of the following statements about natural killer cells is FALSE?A) They destroy virus-infected cells.B) They destroy tumor cells.C) They destroy cells lacking MHC I.D) They are stimulated by an antigen.E) None of the answers are correct; all of these statements are true.
- 19) Large antibodies that agglutinate antigens areA) IgG.B) IgM.C) IgA.D) IgD.E) IgE.
- 23) In Figure 17.1, the arrow at time (c) indicatesA) the time of exposure to the same antigen as at time (a).B) the secondary response.C) the primary response.D) exposure to a new antigen.E) the T-cell response.
- 25) Which of the following is the best definition of antigen?A) something foreign in the bodyB) a chemical that elicits an antibody response and can combine with these antibodiesC) a chemical that combines with antibodiesD) a pathogenE) a protein that combines with antibodies
- 16) The antibodies found on the surface of B cells, and which always exist as monomers, areA) IgG.B) IgM.C) IgA.D) IgD.E) IgE.
- Figure 17.2 28) In Figure 17.2, which areas are similar for all IgG antibodies?A) a and bB) a and cC) b and cD) c and dE) b and d
- 20) The most abundant class of antibodies in serum isA) IgG.B) IgM.C) IgA.D) IgD.E) IgE.
- 36) Cytokines released by TH1 cellsA) activate CD8+ cells to CTLs.B) convert TH1 cells to TH2 cells.C) convert TH2 cells to TH1 cells.D) kill parasites.E) convert B cells to T cells.
- 29) In Figure 17.2, which areas are different for all IgM antibodies?A) a and bB) a and cC) b and cD) c and d