exam 3 exam

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exam 3 exam
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2011-05-01 16:41:25
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exam 3
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  1. The varicella-zoster virus establishes latency in the ___ and if reactivated causes the development of _____
    sensory ganglia, pneumonia
  2. When changes in virion structure occur as a result of major genetic changes, this is called
    antigenic shift
  3. Persitant viral infections that last the lifetime of the host are referred to as ____ infections
    chronic
  4. Most viruses, once inside the human, will disseminate through the
    blood
  5. In response to a specific infection, the innate resonse is active during
    all phases of the infection
  6. What type of immunity is produced by the body when a person receives a vaccine?
    Artificially acquired active immunity
  7. What type of immunity is produced by teh body when an infant receive breastmilk?
    naturallyacquired passive immunity
  8. What type of immunity is produced by the body when a person received antitoxin
    artificially aquired passive immunity
  9. One of the main differenced between protozoans andhelminthes is that protozoans are ____ whereas helminthes are_____.
    Unicellular; multicellular
  10. The two classes of helminthes are:
    cestodes, nematodes
  11. Cestodes are associated with all of the following charactersitics:
    • Possession of a head called the scolex
    • Use of a retractable rostellum for attachment
    • Hermaphroditic nature
  12. Hyphae are associatd with which of the following?
    molds
  13. Unicellular fungi are referred to as
    yeasts
  14. Fungi that can grow in eithe r the yeast or mold form depnding on environmental conditions exhibit
    dimporphism
  15. Antigens are
    specific molcules that the body recognizes as foreign
  16. pyrogens stimulate which fo the following processes
    fever
  17. Which of the following is a type of phagocytic cell?
    neutrophil
  18. Which cell leaves the bloodstream to become a macrophage?
    Monocyte
  19. Which cell increases in number during a helminth infection
    eosinophils
  20. All of the following contian lysozyme except:
    stomach acid
  21. The B-cell antigen receptor is called a(n)
    immunoglobulin
  22. T cells mature in the
    thymus
  23. Long-lived lymphocytes that respond more rapidly and effecitvely on antigen encounter at a later time are known as ____ cells
    membory
  24. CD8
    cytotoxic t cells
  25. What is the first anibody made during an infection?
    IgM
  26. What is the most abundant antibody found in teh blood?
    IgG
  27. Babies who breast feed are afforded passive immune protection of their GI tracts by the presence of ____ in colostrums and breast milk.
    IgA
  28. HIV uses ____, protein molecules on the virus surface, to bind to the surface of T cells, dendritic cells and macrophages.
    gp120 and gp41
  29. Some people are resistant to HIV infection because of mutations in ____ on the surface of host cells
    co-receptors
  30. Which malignancy is commonly associated with AIDS?
    Kaposi sarcoma
  31. De-germing is best described as..
    mechanical process for removing microbes
  32. a bacteriaostatic agent si one that
    inhibits the rowth of the microbe
  33. Of the following, the most efective method of nucleic acid disruption is
    filtration
    pasteurization
    radiation
    freeze-drying
    surfactants
    radiation
  34. Microbial death has occured if
    reproductive capability is lost even when microbe is placed in optimal conditions
  35. The efficacy of penicillin is highest during the ____ phase of bacterial life cycle
    log
  36. Lymphyocytes
    specific
  37. Antibodies
    specific
  38. Lysozyme
    nonspecific
  39. fever
    nonspecific
  40. skin
    nonspecific
  41. memory
    specific
  42. immediate
    nonspecific
  43. plasma cell
    specific
  44. t helper cell
    specific
  45. mucous membane
    nonspecific
  46. The study of fungi is
    mycology
  47. mannan and glucan provide..
    structural stability for fungal hyphae
  48. fungi vary enormously in size from microscopic to macroscopic
    this is true
  49. there are many antibodies to treat fungal infections. true or false?
    false
  50. phenol
    dentaures proteins and disrupts cell membranes
  51. alchohols
    denature proteins, disrupt cell membranes
  52. oxidizing agents
    denatures proteins
  53. aldehydes
    denatures proteins
  54. heavy metals
    denatures proteins
  55. boiling
    denatures proteins and disrupts cell membranes
  56. lyophilzation
    inhibits metabolism
  57. freezing
    inhibits metabolism
  58. pasteurization
    denatures proteins and dirupts cell membranes
  59. What are the four steps of phagocytosis?
    • Chemotaxis
    • Adherence
    • Ingestion
    • Digestion
    • Excretion

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