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8. Which of the following statements are true of innate immunity? (Read carefully and select all of the correct statements.) (5 marks) a) Inflammation is a response to injury and involves the release of histamine and leukotrienes. b) Lysozyme is an antiviral enzyme found in saliva. c) Interferon is an antibacterial chemical produced by macrophages. d) The unbroken stratum corneum is an excellent barrier to pathogens. e) Cilia sweep mucus and trapped pathogens out of the respiratory and digestive tracts. f) Macrophages, Langerhans cells, basophils, and mast cells all contribute to innate immunity. g) Neutrophils are phagocytic white blood cells (WBCs). h) Two signs of inflammation are heat and pain. 9. Which of the following statements are true of adaptive immunity? (Read carefully and select all of the correct statements.) (4 marks) a) Antibody production is characteristic of both antibody-mediated and cell-mediated immunity. b) Opsonization is a reaction of cell-mediated immunity that attracts macrophages. c) Memory B cells provide the memory of a pathogen in cell-mediated immunity. d) Helper T cells help out with phagocytosis. e) Cytotoxic T cells destroy cellular antigens by producing toxic chemicals. f) Complement fixation is triggered by antigen-antibody complexes. g) Helper T cells work with macrophages in the recognition of foreign antigens. h) Antibodies are proteins produced by plasma cells that have differentiated from B cells. 10. Which of the following statements are true of antibodies? (Read carefully and select all of the correct statements.) (3 marks) a) Antibodies destroy antigens by penetrating their cell membranes. b) The only class of antibodies that can cross the placenta is IgM. c) The IgA class of antibodies is found on mucous membranes and in breast milk. d) Antibodies render toxins harmless because they change the shape of the toxins. e) Antibodies label foreign antigens, and such a label stimulates phagocytosis by macrophages. f) Antibodies are effective against viruses because they disable the nucleic acid of the virus.

          8. Which of the following statements are true of innate immunity? (Read carefully and select all of the
correct statements.) (5 marks)
a) Inflammation is a response to injury and involves the release of histamine and leukotrienes.
b) Lysozyme is an antiviral enzyme found in saliva.
c) Interferon is an antibacterial chemical produced by macrophages.
d) The unbroken stratum corneum is an excellent barrier to pathogens.
e) Cilia sweep mucus and trapped pathogens out of the respiratory and digestive tracts.
f) Macrophages, Langerhans cells, basophils, and mast cells all contribute to innate immunity.
g) Neutrophils are phagocytic white blood cells (WBCs).
h) Two signs of inflammation are heat and pain.
9. Which of the following statements are true of adaptive immunity? (Read carefully and select all of
the correct statements.) (4 marks)
a) Antibody production is characteristic of both antibody-mediated and cell-mediated
immunity.
b) Opsonization is a reaction of cell-mediated immunity that attracts macrophages.
c) Memory B cells provide the memory of a pathogen in cell-mediated immunity.
d) Helper T cells help out with phagocytosis.
e) Cytotoxic T cells destroy cellular antigens by producing toxic chemicals.
f) Complement fixation is triggered by antigen-antibody complexes.
g) Helper T cells work with macrophages in the recognition of foreign antigens.
h) Antibodies are proteins produced by plasma cells that have differentiated from B cells.
10. Which of the following statements are true of antibodies? (Read carefully and select all of the
correct statements.) (3 marks)
a) Antibodies destroy antigens by penetrating their cell membranes.
b) The only class of antibodies that can cross the placenta is IgM.
c) The IgA class of antibodies is found on mucous membranes and in breast milk.
d) Antibodies render toxins harmless because they change the shape of the toxins.
e) Antibodies label foreign antigens, and such a label stimulates phagocytosis by macrophages.
f) Antibodies are effective against viruses because they disable the nucleic acid of the virus.

8. Which of the following statements are true of innate immunity? (Read carefully and select all of the
correct statements.) (5 marks)
a) Inflammation is a response to injury and involves the release of histamine and leukotrienes.
b) Lysozyme is an antiviral enzyme found in saliva.
c) Interferon is an antibacterial chemical produced by macrophages.
d) The unbroken stratum corneum is an excellent barrier to pathogens.
e) Cilia sweep mucus and trapped pathogens out of the respiratory and digestive tracts.
f) Macrophages, Langerhans cells, basophils, and mast cells all contribute to innate immunity.
g) Neutrophils are phagocytic white blood cells (WBCs).
h) Two signs of inflammation are heat and pain.
9. Which of the following statements are true of adaptive immunity? (Read carefully and select all of
the correct statements.) (4 marks)
a) Antibody production is characteristic of both antibody-mediated and cell-mediated
immunity.
b) Opsonization is a reaction of cell-mediated immunity that attracts macrophages.
c) Memory B cells provide the memory of a pathogen in cell-mediated immunity.
d) Helper T cells help out with phagocytosis.
e) Cytotoxic T cells destroy cellular antigens by producing toxic chemicals.
f) Complement fixation is triggered by antigen-antibody complexes.
g) Helper T cells work with macrophages in the recognition of foreign antigens.
h) Antibodies are proteins produced by plasma cells that have differentiated from B cells.
10. Which of the following statements are true of antibodies? (Read carefully and select all of the
correct statements.) (3 marks)
a) Antibodies destroy antigens by penetrating their cell membranes.
b) The only class of antibodies that can cross the placenta is IgM.
c) The IgA class of antibodies is found on mucous membranes and in breast milk.
d) Antibodies render toxins harmless because they change the shape of the toxins.
e) Antibodies label foreign antigens, and such a label stimulates phagocytosis by macrophages.
f) Antibodies are effective against viruses because they disable the nucleic acid of the virus.

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