Chapter 22

Which of the following is not among the first line of immune defenses against infection? a. skin b. acidic gastric fluid c. lysozyme in saliva d. resident bacterial populations e. complement activation f. flushing action of diarrhea

Which of the following is not part of an innate immune response? a. phagocytic cells b. fever c. histamines d. cytokines e. inflammation f. complement activation g. presenting antigen h. all take part

Which of the following is not part of an adaptive immune response? a. phagocytic cell b. antigen-presenting cells c. histamines d. cytokines e. antigen receptors f. complement activation g. antibodies h. all take part

Activated complement proteins _____. a. form pore complexes b. promote inflammation c. attract phagocytes d. all of the above

_____ trigger immune responses. a. Cytokines b. Lysozymes c. Antibodies d. Antigens e. Histamines f. all of the above

Name a characteristic of innate immunity.

Antibodies are _____. a. antigen receptors b. made only by B cells c. proteins d. all of the above

Name a characteristic of adaptive immunity.

A dendritic cell engulfs a bacterium, then presents bacterial bits on its surface along with a(n) _____. a. MHC marker b. antibody c. \(\mathrm{T}\) cell receptor d. antigen

Antibody-mediated responses are most effective against ______. a. intracellular pathogens b. extracellular pathogens c. cancerous cells d. both a and b e. both b and c f. \(a, b,\) and \(c\)

Cell-mediated responses are most effective against _____. a. intracellular pathogens b. extracellular pathogens c. cancerous cells d. both a and b e. both a and c f. \(a, b,\) and \(c\)

_____ are targets of cytotoxic T cells. a. Extracellular virus particles in blood b. Virus-infected body cells or tumor cells c. Parasitic worms in the liver d. Bacterial cells in pus e. Pollen grains in nasal mucus

Allergies occur when the body responds to ______. a. pathogens b. toxins c. normally harmless substances d. all of the above

Match the immune cell with its main function. _____dendritic cell _____B cell _____helper T cell _____NK cell _____cytotoxic T cell a. kills virus-infected cells b. antigen-presenter c. activates other lymphocytes d. kills cancer cells e. makes antibodies

Match the immunity concepts. _____anaphylactic shock _____immune memory _____autoimmunity _____inflammation _____immune deficiency _____antigen receptor _____antigen processing a. recognizes antigen b. inadequate immune response c. general defense mechanism d. immune response against one's own body e. secondary response f. systemic allergic reaction g. presenting antigen together with MHC molecules