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- A dendritic cell engulfs a bacterium, then presents bacterial bits on its surface along with an _______. a. MHC marker c. T cell receptor b. antibody d. antigenAntibodies are ________. a. antigen receptors c. proteins b. made only by B cells d. all of the aboveActivated complement proteins ________. a. puncture cells c. attract macrophages b. promote inflammation d. all of the above
- Which of the following are important for viral protection? ( select all the correct answers) a) Macrophages b) Interferons c) Skin d) Natural Killer lymphocytesWhich of the following are important for viral protection? Group of answer choices a) Macrophages b)Interferons c)Skin d)Natural Killer lymphocytesA young child is hospitalized with recurring bacterial infections, although she appears to make normal responses to viruses. Which of the following molecules might be defective in her immune system? (select all that could contribute to this condition) Select one or more: a.RAG1/RAG2 b.MCP or DAF c.C3 d.CXCL-8 e.IFN receptors
- Antibodies, complement proteins, and phagocytic cells provide effective protection against all of the following types of infections except: a) Fungi b) Virus-infected cell c) Worms d) Bacteria e) VirusesWhen virus enters into our body, many cells acquire antiviral state due to: a Acquiring resistance b. Interleukin production C. Antigen production d. Antibody production e. Interferon productionWhich of the following plays a role in the Arthus reaction?a. IgE antibodies. b. complement c. cell-associated antigen d. cytotoxic T cells
- Which of the following is NOT a surface barrier serving as the first line of defense? a. mucus b. antibody c. keratin d. oilWhich of the following is NOT true of B ceIls?a. Has membrane-bound antibodies.b. Produces antibodies when activated into plasma cells.c. Has MHC class II molecules.d. Kills infected body cells.For question with blanks, choose the combination of answers that most accurately completes the statement.Small, simple molecules are ................... antigens. a. poor c. effective b. never d. mosaic
