BIO202_MH_Topic 5: Immunity (QUESTIONS AND ANSWERS_GRADED A+)

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 BIO202_MH_V3  Topic 5: Immunity Started on Friday, October 22, 2021, 4:02 PM State Finished Completed on Friday, October 22, 2021, 4:21 PM Time taken 19 mins 8 secs Grade 40.00 out of 40.... 00 (100%) Question 1 Correct 2.00 points out of 2.00 Flag question Question text Primary lymphatic organs include the Select one: a. tonsils and spleen. b. thymus and lymph nodes. c. red bone marrow and thymus. d. red bone marrow and lymph nodes. Question 2 Correct 2.00 points out of 2.00 Flag question Question text Transfusing a person with plasma proteins from a person or an animal that has been actively immunized against a specific antigen provides Select one: a. active immunity. b. passive immunity. c. no immunity. d. autoimmunity. e. natural immunity. Question 3 Correct 2.00 points out of 2.00 Flag question Question text Which of the following is NOT a mechanism of complement action? Select one: a. produces cytokines b. opsonization c. attracts other immune cells to the site of infection d. forms a MAC that leads to cell lysis Question 4 Correct 2.00 points out of 2.00 Flag question Question text A traditional method of providing temporary immunity for a person who is suspected of being infected (usually be an animal bite) with rabies is classified as Select one: a. active natural immunity. b. active artificial immunity. c. passive natural immunity. d. passive artificial immunity. e. passive active immunity. Question 5 Correct 2.00 points out of 2.00 Flag question Question text Interferon Select one: a. directly attacks viruses. b. protects cells that have been invaded by viruses. c. increases vascular permeability. d. is not produced by most cells. e. is a protein that interferes with virus production and infection. Question 6 Correct 2.00 points out of 2.00 Flag question Question text T helper cells possess a glycoprotein called CD4. This molecule binds to Select one: a. MHC class I molecules. b. MHC class II molecules. c. MHC-CD8 antigens. d. MHC-CD28 antigens. e. Interleukin-1 receptor. Question 7 Correct 2.00 points out of 2.00 Flag question Question text The intense inflammatory response seen in poison ivy is due to activity of the Select one: a. cytotoxic T cells. b. plasma cells. c. delayed hypersensitivity cells. d. macrophages. e. mast cells. Question 8 Correct 2.00 points out of 2.00 Flag question Question text Why is a cell-mediated immune response more effective against intracellular microorganisms (such as viruses) than an antibody-mediated response? Select one: a. Cell-mediated (vs. antibody-mediated) response results in activation of a many more immune cells, so it is more effective at destroying antigens b. Intracellular microorganisms are too large for antibodies to be effective against c. Intracellular microorganisms are too small for antibodies to be effective against d. Cell-mediated response results in destruction of cell containing the intracellular microorganism; antibodies can't enter cells Question 9 Correct 2.00 points out of 2.00 Flag question Question text Treatments of disease that include the alteration of immune functions are called: Select one: a. hypersensitivity. b. passive immunity. c. active immunity. d. adaptive immunity. e. immunotherapy. Question 10 Correct 2.00 points out of 2.00 Flag question Question text An individual develops a cold from a co-worker. This is an example of ______ immunity. Select one: a. active artificial b. passive natural c. passive artificial d. active natural Question 11 Correct 2.00 points out of 2.00 Flag question Question text Which of the following is correctly matched? Select one: a. IgA - found in saliva and tears b. IgD - can cross the placenta c. IgG - first to challenge the antigen d. IgM - Binds to mast cell e. IgE - transfusion reactions Question 12 Correct 2.00 points out of 2.00 Flag question Question text An MHC class II/antigen complex on the surface of an antigen-presenting cell (APC) binds to a T-cell receptor. What results from this interaction? Select one: a. Other immune cells are inhibited b. The antigen is phagocytized by the T cell c. The T cell responds by directly destroying the APC d. Other immune cells are stimulated to respond to the antigen Question 13 Correct 2.00 points out of 2.00 Flag question Question text Which of the following is NOT an aging effect of the lymphatic system and immunity? Select one: a. Fluid removal by the lymphatic capillaries is reduced. b. Fewer antibodies are produced. c. Onset of autoimmune diseases is unchanged. d. T cell numbers remain constant but they are less functional. Question 14 Correct 2.00 points out of 2.00 Flag question Question text Which of the following is false? Select one: a. The HIV virus binds to the CD4 molecule of host cells. b. There is currently only one cure for AIDS - AZT. c. Most manifestations of AIDS are explained by the loss of helper T cell functions. d. Once infected by the virus, a person will test positive for HIV antibodies. e. In order for HIV to replicate, viral RNA is used to make viral DNA, which is inserted into the host cell's DNA. Question 15 Correct 2.00 points out of 2.00 Flag question Question text The HIV virus can be transmitted Select one: a. only from males to other males. b. during unprotected sexual intercourse. c. by coughing or sneezing. d. by contact with people at work. e. by hugging an infected child. Question 16 Correct 2.00 points out of 2.00 Flag question Question text Which of the following will increase your risk of contracting the HIV virus? Select one: a. use of a condom during intercourse b. heat treatment of clotting factors prior to transfusion c. use of contaminated needles d. reduction in the number of sexual partners e. abstinence Question 17 Correct 2.00 points out of 2.00 Flag question Question text In immunodeficiency diseases, Select one: a. the immune system fails to distinguish between self-antigens and foreign antigens. b. inadequate B and/or T cell formation may occur. c. IgE mediates a localized reaction. d. serum sickness results. e. immune surveillance occurs. Question 18 Correct 2.00 points out of 2.00 Flag question Question text Several research groups are working on vaccines that will be effective against the AIDS virus. When a successful vaccine is produced, it is likely to be injected to produce Select one: a. active natural immunity. b. active artificial immunity. c. passive natural immunity. d. passive artificial immunity. e. active passive immunity. Question 19 Correct 2.00 points out of 2.00 Flag question Question text An abnormal, exaggerated response of the immune system is called Select one: a. immunization. b. an innate immune response. c. hypersensitivity. d. excess immunity. e. tolerance. Question 20 Correct 2.00 points out of 2.00 Flag question Question text The HIV virus infects Select one: a. B cells. b. cytotoxic T cells. c. suppressor T cells. d. helper T cells. e. monocytes. [Show More]

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