Question

Name: 43. Antigens can be found on... (a) flagella (b) cell walls (c) human cells (d) all of the above 40. What is the site where stem cells develop and mature into T lymphocytes in humans? (a) spice (b) thymus (c) blood (d) bone marrow 47. Antigen presentation with MHC I molecules sensitizes which type of T cell? (a) cytotoxic T cells (b) helper T cells (c) plasma cells (d) all of the above 48. How does the Tc cell destroy infected cells? (a) phagocytosis (b) squeezes through capillary walls (c) releases opsonins such as antibodies (d) releases granzymes and perforins to trigger apoptosis 49. The ultimate response of humoral immunity is... (a) destruction of infected cells by Tecells (b) destruction of cells by Tu cells (c) production of antibodies (d) phagocytosis 50. Which of the following classes of immunoglobulins is normally found as a pentamer in blood and strongly causes agglutination? (a) IgG (b) IgM (c) IgA (d) IgE 51. With regard to humoral immunity, which of the following is/are required for a sufficient secondary response? (a) binding of B cells to cytotoxic T cells (b) production of cytokines by helper T cells (c) production of perforin and granzyme molecules (d) a &b 52 Which of the following preventative injections provides only temporary protection, which dissipates after it is cleared from the human body? (a) immune serum globulin (b) live attenuated vaccines (c) toxoids (d) all of the above 53. What is "class switching"? (a) it refers to the ability of lgs to cross epithelial layers' (b) tis when plasma cells begin to make a different class of lgs, such as previously producing IgM to making IgG (c) it is when plasma cells differentiate and become memory cells (d) none of the above 54. During the secondary response of your humoral immune system, which class of antibodies contributes to the larger secondary response? (a) IgG (b) IgA (c) IgM (d) IgE 55. Which class of immunoglobulins is capable of being transported across epithelial cells, which provides protection from inside the intestines? (a) IgG (b) IgA (c) IgM (d) IgE 56. Which of the following pairs of cells are fused to form hybridomas? (a) tumor and natural Wifer cells (b) myelomas and Tc cells (c) myelomas and B lymphocytes (d) tumor and neutrophils se 57. Which of the following is NOT true of the primary and secondary responses of your humoral immune system? (a) the first response results in production of antibodies by plasma cells (b) the secondary response is faster and produces a greater number of antibodies than the response (c) the first response does not produce any memory cells (d) the first and secondary response will exhibit production of IgMs and IgGs 58. Which of the following is/are considered Type 11 Hypersensitivity reactions? (a) blood transfusions (b) hemolytic disease of the newborn (c) contact dermatitis (d) a &b 59. If a young child suffered from measles, which led to a defect in Bor T cells, this is known (a) primary immunodeficiency (b) secondary immunodeficiency (c) AIDS (d) autoimmunization

Answer 1

ANSWER- 45) Antigen can be found on - d) all of the above

46) what is the site where stem cell develop and mature into T lymphocytes in humans - b) thymus

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