Bio

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Bio
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2011-05-03 14:36:29
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bio 33
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  1. Which kind of T cells regulate the immune response by producing stimulatory lymphokines?
    A. memory T cells (Tm)
    B. cytotoxic T cells (Tc)
    C. helper T cells (Th)
    D. suppressor T cells (Ts)
    C. helper T cells
    (this multiple choice question has been scrambled)
  2. Which of the following characterize B cells?
    A. they function in antibody mediated immunity against bacteria.
    B. A and C are correct
    C. the are manufactured and mature in the bone marrow
    D. all of the choices characterize B cells
    E. they directly recognize antigens and undergo clonal selection
    D. all of the choices are correct
    (this multiple choice question has been scrambled)
  3. All of the following are functions of the lymphatic system EXCEPT:
    A. defending the body against pathogens
    B. production, maintenance, and distribution of lymphocytes
    C. absorbing excess tissue fluids and returning them to the bloodstream
    D. transporting gasses, nutrients, and metabolic wastes to parts of the body which have exchange boundaries with the external enviornment
    D. transporting gasses, nutrients, and metabolic wastes to parts of the body which have exchange boundaries with the external enviornment
    (this multiple choice question has been scrambled)
  4. All of the following are outward signs of inflammation EXCEPT:
    A. lower temperature
    B. redness
    C. swelling
    D. pain
    A. lower temperature
    (this multiple choice question has been scrambled)
  5. The clonal selection theory states that:
    A. all B cells are exact clones of each other
    B. all T cells are exact clones of each other
    C. when a B or T cell is stimulated by encountering the correct antigen, it divides to form a clone of cells that will respond to the same antigen
    D when a B or T cell is stimulated by encountering a correct antibody, it divides to form a clone of the cells that will respond to the same antibody
    • C. when a B or T cell is stimulated by encountering the correct antigen,
    • it divides to form a clone of cells that will respond to the same
    • antigen
  6. Allergies are hypersensitivities to substances that would ordinarily do no harm to the body

    TRUE of FALSE
    TRUE
  7. Which of these statements is NOT true about complement?
    A. complement is required for formatio of antigen-antibody complexes
    B. complement attracts phagocytes to the bacterial cell and increase its likelihood of being engulfed
    C. complement is a complex of plasma proteins that are activated in the presence of pathogens
    D. complement forms holes in bacteria membranes and allows fluid and salts to enter a bacterial cell
    A. complement is required for formatio of antigen-antibody complexes
    (this multiple choice question has been scrambled)
  8. Which of the following is part of the body's specific defenses against disease?
    A. cilia of the respiratory tract
    B. sebaceous glands of the skin
    C. antibody production
    D. fever
    E. inflammation
    C. antibody production
    (this multiple choice question has been scrambled)
  9. Which statement is NOT true of the T cells?
    A. T cells require presentation of antigens by macrophages before they are able to recognize the antigen
    B. T cells carry receptor molecules on their cell surfaces
    C. T cells mature in the thymus
    D. T cells change into plasma cells and produce antibodies when stimulated
    D. T cells change into plasma cells and produce antibodies when stimulated
    (this multiple choice question has been scrambled)
  10. Maturation of B cells occurs in the:
    A. lymph nodes
    B. bone marrow
    C. peyer's patches
    D. thymus
    E. spleen
    B. bone marrow
    (this multiple choice question has been scrambled)
  11. Cytokines:
    A. are soluable proteins that act as signaling molecules to stimulate white blood cells
    B. are secreted by macrophages to stimulate the replication of cancer cells
    C. inhibit production of T and B cells
    D. repel neutrophils from the site of infection
    A. are soluable proteins that act as signaling molecules to stimulate white blood cells
    (this multiple choice question has been scrambled)
  12. Autoantibodies are produced against substances in the enviornment, resulting in a number of diseases such as rheumatoid arthritis and multiple selerosis

    TRUE of FALSE
    FALSE
  13. Complement and infection are specific kinds of antibodies
    TRUE of FALSE
    FALSE
  14. Anaphylactic shock
    A. is characterized by a sudden and life-threatening drop in blood pressure
    B. occurs when the allergen has entered the bloodstream
    C. is an immediate allergic reaction
    D. all of the above are true
    E. B and C only are true
    D. all of the above are true
  15. Which of the following statements about B cells is true?
    A. B cells develop and mature in the bone marrow
    B. B cells carry receptor molecules on their cell surfaces
    C. B cells change into plasma cells after encountering an antigen and then produce antibodies
    D. some B cells become memory cells
    E. all of the above are true
    E. all of the above are true
  16. ________are some of the same type since they are derived fromthe same B cell and are against a specific antigen?
    A. immunosuppressant agents
    B. monoclonal antibodies
    C. aggultination factore
    D. autoimmune agents
    E. allergen antibodies
    B. monoclonal antibodies
    (this multiple choice question has been scrambled)
  17. All of the following are part of the lymphatic system EXCEPT:
    A. the thymus gland
    B. the spleen
    C. red bone marrow
    D. the thyroid gland
    D. the thyroid gland
    (this multiple choice question has been scrambled)
  18. Natural Killer (NK) cells that destroy virus-infected cells and cancer cell are
    A. eosinophils
    B. suppressor T cells (Ts)
    C. large, granular lymphocytes
    D. neutrophils
    C. large, granular lymphocytes
    (this multiple choice question has been scrambled)
  19. Match the phase of HIV with the Helper T -cell count and HIV per ml plamsa:

    1> 3. Acute Phase
    2> 1. AIDs
    3> 2. Chronic phase

    * HIV count in blood rises drastically and Helper T cell continues to decline __________
    * HIV gradually increases and Helper T cell gradually decreases __________
    * HIV count peaks and the crashes due to immune response; Helper T-cell count crashes and then gradually declines __________
  20. * HIV count in blood rises drastically and Helper T cell continues to decline _____2_____
    • * HIV gradually increases and Helper T cell gradually decreases _____3_____
    • * HIV count peaks and the crashes due to immune response; Helper T-cell
    • count crashes and then gradually declines _____1_____
  21. Maturation of T cells occurs in the
    A. lymph nodes
    B. bone marrow
    C. peyer's patches
    D. spleen
    E. thymus
    E. thymus
    (this multiple choice question has been scrambled)
  22. Interferon is a protein that binds to the receptors of non-infected cells causing them to produce substances that interfere with viral replication
    TRUE or FALSE
    TRUE
  23. The second line of defense in the body that takes longer to become functional, since the cells much be recruited to producce specific responses against the antigens
    TRUE or FALSE
    TRUE
  24. ___cells are responsible for cell0mediated immunity and__cells are responsible for antibody-mediated immunity
    A. T;T
    B. T;B
    C. B;T
    D T and B cells; T and B cells
    B. T; B
    (this multiple choice question has been scrambled)
  25. The presence of antibodies in a newborn baby is most often due to:
    A. natural immunity developed in the baby before birth
    B. exposure of the baby to antigens after birth
    C. A and C are correct
    D. antibodies that crossed the placenta from the mothers blood
    E. immunity developed after birth
    D. antibodies that crossed the placenta from the mothers blood
    (this multiple choice question has been scrambled)
  26. The cell responsible for producing a rapid antibody response against a foreign protein when it is encountered years after the first encounter is a:
    A. killer T cell
    B. memory B cell
    C. plasmaa cell
    D. memory T cell
    B. memory B cell
    (this multiple choice question has been scrambled)
  27. The lymphoid organ in which B lymphocytes are produced is the:
    A. B and D are correct
    B. lymph nodes
    C. thymus gland
    D. red bone marrow
    E. spleen
    D. red bone marrow
    (this multiple choice question has been scrambled)
  28. Interleukins are:
    A. molecules produced by white blood cells that stimulate other white blood cells, namely T cells
    B. proteins produced by virus-infected cells that stimulate an immune response
    C. proteins produced by plasma cells that stimulate the clotting of blood
    D. chemicals that enhance all lymphatic organs
    A. molecules produced by white blood cells that stimulate other white blood cells, namely T cells
    (this multiple choice question has been scrambled)
  29. Which of the following T cells are mismatched with their functions?
    A. helper T cells; secrete cytokines to control immune responses
    B. memory T cells- mediate apoptosis
    C. all of the choices are correctly matched with their functions
    D. cytotoxic T cells; destroy non-self proteins
    B. memory T cells- mediate apoptosis
    (this multiple choice question has been scrambled)
  30. The activities of macrophages:
    A. are part of the nonspecific response against disease
    B. stimulate lymphocytes to carry on specific immunity
    C. stimulate phagocytic neutrophils
    D. all of the above are correct
    E. A and C are correct
    E. A and C are correct
  31. Which antibody class is most prevalent in the bloodstream?
    A. IgG
    B. IgM
    C. IgA
    D. IgD
    E. IgE
    A. IgG
    (this multiple choice question has been scrambled)
  32. As lymph passes through the sinuses of lymph nodes, it is filtered by _____ that engulfs debris and pathogens
    A. B cells
    B. T cells
    C. neutrophils
    D. macrophages
    D. macrophages
    (this multiple choice question has been scrambled)
  33. What specific part off the antibody determines that class of antibody?
    A. constant region
    B. variable region of the light chain and heavy chain
    C. antigen binding sites
    D. all of the above are correct
    E. A and B are correct
    A. constant region
    (this multiple choice question has been scrambled)
  34. If a person is bitten by a highly venomous snake and revcieves a dose of venom sufficient to kill several people that person does not have time to build up his immunity over the next week to neutralize the venom. However, hospitials carry "antivenin" made from injecting horses with small-to-larger dosages of snake venom, and harvesting the antibodies from the horse plasma, this is an example of:
    A. active immunity
    B. receiving high levels of interferon
    C. passive immunity
    D. develpoing an inflammatory response to increase the IgG production
    E. receiving igh levels of complement
    C. passive immunity
    (this multiple choice question has been scrambled)
  35. The problem with tissue rejection following organ transplants
    A. can be reduced if the organ donor is a close relative with very similar tissue proteins
    B. can be reduced by administering immunosuppressive drugs
    C. is due to the tissues being recognied as nonself, and therefore being treated as a foreign substance
    D. all the choices are correct
    E. B and C are correct
    D. all the choices are correct
    (this multiple choice question has been scrambled)
  36. The first line of defense against invading microorganisms is nonspecific.
    TRUE of FALSE
    TRUE
  37. Nonspecific defenses against disease incluse all of the following EXCEPT:
    A. inflammatory reaction
    B. complement
    C. antibodies
    D. skin and musous membranes
    E. natural killer cells
    C. antibodies
    (this multiple choice question has been scrambled)
  38. Which kind of T cell is most important in the remobal of cancer cells or virally infected cells from the body?
    A. suppressor T cells
    B. memory T cells
    C. cytotoxic T cells
    D. helper T cells
    C. cytotoxic T cells
    (this multiple choice question has been scrambled)
  39. Most of the lymph fluid is returned to the bloodstream through the thoracic duct to the:
    A. right atrium of the heart
    B. right subclavian vein
    C. right ventricle of the heart
    D. left atrium of the heart
    E. left subclavian vein
    E. left subclavian vein
    (this multiple choice question has been scrambled)
  40. Immesiate allergic responses are caused by ____antibodies:
    A. IgA
    B. IgD
    C. IgG
    D. IgE
    E. IgM
    D. IgE
    (this multiple choice question has been scrambled)
  41. Rejection of transplanted tissue is treated with immunosuppressive drugs that prevent the activity of B cells

    TRUE or FASLE
    FALSE
  42. Edward Jenner promoted the use of cowpox infection that was very similar to the more dangerous smallpox as a vaccination to provide patients immunity from future smallpox epidemics. this is an example of:
    A. developing high levels of interferon although jenner did not realize these disease were viral
    B. developing high levels of complement
    C. passive immunity
    D. active immunity
    E. an inflammatory response that decreased the IgE production and increased T cells
    D. active immunity
    (this multiple choice question has been scrambled)
  43. What is the fate of plasma cells after the threat of infection is over?
    A. they undergo apoptosis
    B. they continue to "stand guard" to protect the individual from future invasion
    C. all of the choices are fates of plasma cells
    D. they become part of the complement system of proteins
    A. they undergo apoptosis
    (this multiple choice question has been scrambled)
  44. The primary hosts for HIV are
    A. suppressor T cells
    B. memory T cells
    C. cytotoxic T cells
    D. helper T cells
    D. helper T cells
    (this multiple choice question has been scrambled)
  45. Which is NOT part of a description of an antibody molecule?
    A. contains a constant and a variable region on each chain
    B. contains 2 light chains and 2 heavy chains
    C. forms an X-shaped protein molecule
    D. contains an antigen-binding site on each arm
    C. forms an X-shaped protein molecule
    (this multiple choice question has been scrambled)
  46. Lymph consists of
    A. hemoglobin, water, ions, nutrients, and gases
    B. water, fat molecules, ions, nutrients, gases, proteins, and antibodies
    C. red blood cells, white blood cells, platelets and plasma
    D. mostly DNA and RNA
    B. water, fat molecules, ions, nutrients, gases, proteins, and antibodies
    (this multiple choice question has been scrambled)
  47. Which of the following is NOT involved in specific immunity?
    A. antibodies
    B. T cells
    C. B cells
    D. memory cells
    E. complement
    E. complement
    (this multiple choice question has been scrambled)

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