Chapter 23

_______________ trigger immune responses. a. Cytokines b. Antibodies c. Antigens d. Histamines

Which of the following is not a surface barrier to infection? a. diarrhea b. acidic gastric fluid c. lysozyme in salivaskin d. skin e. complement activation f. resident populations of bacteria

Activated complement proteins can _________ . a. puncture cells b. promote inflammation c. attract phagocytes d. all of the above

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

Which of the following is not part of adaptive immunity? a. phagocytes b. antigen-presenting cells c. MHC molecules d. cytokines e. antigen receptors f. complement activation g. antibodies h. all take part

Choose the characteristics of adaptive immunity. a. self/nonself recognition b. immediate response c. antigen memory d. diverse antigen receptors e. fixed number of PAMPs f. tailored for specific antigens

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

A dendritic cell engulfs a bacterium, then presents bacterial bits on its surface together with ______. a. MHC molecules b. antibodies c. T cell receptors d. antigens

Antibody-mediated responses most effectively target _________ . a. intracellular pathogens b. extracellular pathogens c. cancerous cells d. both a and \(c\)

Cell-mediated responses most effectively target ________ . a. intracellular pathogens b. extracellular pathogens c. cancerous cells d. both a and \(c\)

_____________ are killed by cytotoxic T cells. a. Extracellular virus particles in blood b. Virus-infected body cells c. Bacterial cells in tissue fluiddd d. Pollen grains in nasal mucus

Match the immune cell with the best description. $$ \text {dendritic cell} \quad \quad \text {a. large phagocyte} $$ $$ \text {B cell} \quad \quad \text {b. antigen-presenter} $$ $$ \text {helper T cell } \quad \quad \text {c. activates other lymphocytes} $$ $$ \text {macrophage } \quad \quad \text {d. makes antibodies} $$

_______________can kill ailing body cells that lack MHC molecules.

Match the immunity concepts. $$ \text {anaphylactic shock} \quad \quad \text {a. recognizes antigen} $$ $$ \text {immune memory} \quad \quad \text {b. insufficient immune response} $$ $$ \text {autoimmunity } \quad \quad \text {c. general defense mechanism} $$ $$ \text {inflammation } \quad \quad \text {d. immune response against one's own body} $$ $$ \text {immune deficiency} \quad \quad \text {e. secondary response} $$ $$ \text {antigen receptor} \quad \quad \text {f. acute allergic reaction} $$