Solved by a verified expert:Question 12.50 points out of 2.50Question textTransplanted tissues and organs that contain _________ _________ are rejected by the body.Select one:a. self-antigensb. foreign antigensc. foreign antibodiesd. self-antibodiese. plasma proteinsQuestion 22.50 points out of 2.50Question textB-cellsSelect one:a. are a subset of T cells.b. when activated become plasma cells and produce antibodies.c. are responsible for forming all the body’s memory cells.d. suppress the activity of T cells.e. mature in the thymus.Question 32.50 points out of 2.50Question textWhich of the following is NOT a secondary lymphatic organ?Select one:a. spleenb. lymph nodec. lymphatic noduled. thymus glandQuestion 42.50 points out of 2.50Question textWhich of the following is ly matched?Select one:a. IgA – found in saliva and tearsb. IgD – can cross the placentac. IgG – first to challenge the antigend. IgM- binds to mast cells and basophils to stimulate inflammatione. IgE – transfusion reactionsQuestion 52.50 points out of 2.50Question textWhich of the following is usually the first cell type to leave the blood and enter infected tissues?Select one:a. eosinophilb. lymphocytec. monocyted. natural killer celle. neutrophilQuestion 62.50 points out of 2.50Question textIn systemic inflammation, pyrogensSelect one:a. decrease phagocytosis.b. decrease vasodilation.c. increase neutrophil production.d. stimulate fever production.e. are chemotaxic factors.Question 72.50 points out of 2.50Question textLymphocyte activation can occur in several ways. However, in all casesSelect one:a. lymphocytes must recognize an antigen.b. helper T cells are activated first and they then stimulate other cells.c. antigen-presenting cells process the antigen and present it to the lymphocytes.d. cytokines released by the antigen stimulate the lymphocyte response.e. antigens must be able to recognize the lymphocytes.Question 82.50 points out of 2.50Question textMHC class II molecules are found onSelect one:a. neutrophils, monocytes, and macrophages.b. dendritic cells, B cells, and helper T cells.c. monocytes, helper T cells, and neutrophils.d. B cells, macrophages, and dendritic cells.e. B cells, C cells and D cells.Question 92.50 points out of 2.50Question textWhich of the following substances DOES NOT cause increased capillary permeability, chemotaxis, and vasodilation?Select one:a. cytokinesb. protaglandinsc. leukotrienesd. complemente. histamineQuestion 10In0.00 points out of 2.50Question textWhich is the proper order of events in cell-mediated immunity?(1) cloning of cytotoxic T cells and memory T cells(2) antigen presented to T lymphocyte(3) activation of T lymphocytes(4) cytotoxic T cells attack target cellsSelect one:a. 2, 3, 4, 1b. 1, 4, 2, 3c. 2, 3, 1, 4d. 3, 2, 4, 1e. 1, 2, 3, 4,Question 112.50 points out of 2.50Question text____ are part of cell-mediated immunity while ____ are part of antibody-mediated immunity.Select one:a. B cells, NK cellsb. Antibodies, antigensc. T cells, B cellsd. Macrophages, antibodiese. Neutrophils, monocytesQuestion 122.50 points out of 2.50Question textOnce cytotoxic T cells are produced, which of the following is (are) consistent with their ability to attack intracellular viruses?Select one: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 .Question 132.50 points out of 2.50Question textWhich of the following is a subpopulation of T cells?Select one:a. cytotoxicb. antigenicc. cytokineticd. basophilice. antitoxicQuestion 142.50 points out of 2.50Question textIn the cell-mediated immune response, T cells secrete ___, which activate additional components of the immune system.Select one:a. antibodiesb. complementc. collagend. cytokinese. histamineQuestion 152.50 points out of 2.50Question textThe diagram illustrates the stimulation and effects of T cells. What does “A” represent?Select one:a. memory T cellsb. cytotoxic T cellsc. contact killingd. lysis of target celle. release of cytokinesQuestion 162.50 points out of 2.50Question textLymphocyte proliferation begins by increasing the number ofSelect one:a. macrophages.b. B cells.c. T suppressor cells.d. helper T cells.e. cytotoxic T cells.Question 172.50 points out of 2.50Question textAntibodies secreted in breast milkSelect one:a. are IgG antibodies.b. are IgA antibodies.c. provide natural active adaptive immunity.d. include the cytokine interleukin 2.e. promote inflammation.Question 182.50 points out of 2.50Question textWhich of the following would be classified as an innate physical barrier?Select one:a. activation of complementb. phagocytosis of invading organismsc. washing action of tears and salivad. inflammatione. release of histamineQuestion 192.50 points out of 2.50Question textThe inflammatory responseSelect one:a. prevents the spread of an infection.b. stimulates erythrocytes to leave the blood.c. delays healing of damaged tissues.d. depresses immunity.e. is harmful and should be immediately reversed.Question 202.50 points out of 2.50Question textThe effects of cell-mediated immunity are the result of activities ofSelect one:a. B cells.b. cytotoxic T cells.c. macrophages.d. dendritic cells.e. helper T cells.
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