Radiation Potection

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Anonymous
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302826
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Radiation Potection
Updated:
2015-05-16 23:38:22
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Biological aspects of radiation 2
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  1. Which of the following dose-response curve characteristics represent genetic and some somatic responses to radiation?















    1. Linear
    2. Nonthreshold
    3. Sigmoidal






     
    1 only 



     
    1 and 2 only 



     
    1 and 3 only 



     
    1, 2, and 3
    •  
    •  
    • 1 and 2 only
  2. Genetic effects of radiation and some somatic effects, like leukemia, are plotted on a___ dose–response curve. 
     linear
  3. What is the relationship between LET and RBE?




     
    As LET increases, RBE increases. 



     
    As LET increases, RBE decreases. 



     
    As LET decreases, RBE increases. 



     
    There is no direct relationship between LET and RBE.
    •  
    •  
    • As LET increases, RBE increases.
  4. Late radiation-induced somatic effects include

    1. thyroid cancers

    2. cataractogenesis

    3. skin cancers






     
    1 only 



     
    1 and 2 only 



     
    2 and 3 only 



     
    1, 2, and 3
    •  
    •  
    • 1, 2, and 3
  5. Examples of stochastic effects of radiation exposure include

    1. radiation-induced malignancy

    2. genetic effects

    3. leukemia






     
    1 only 



     
    1 and 2 only 



     
    2 and 3 only 



     
    1, 2, and 3
    •  
    •  
    • 1, 2, and 3
  6. Late effects of radiation, whose incidence is dose related and for which there is no threshold dose, are referred to as




     
    nonstochastic 



     
    stochastic 



     
    chromosomal aberration 



     
    hematologic depression
    •  
    •  
    • stochastic
  7. Increasing that dose will increase the likelihood of the occurrence but will not affect its severity; these effects are termed _____
    stochastic.
  8. The symbols  Ba and  Ba are examples of which of the following?




     
    Isotopes 



     
    Isobars 



     
    Isotones 



     
    Isomers
    •  
    •  
    • Isotopes
  9. have the same atomic number but different mass numbers (numbers of neutrons).
     isotopes
  10. _____ are atoms with the same mass number but different atomic numbers. 
    Isobars
  11. ____ have the same number of neutrons but different atomic numbers.
    Isotones
  12. ____ have the same atomic number and mass number;
    Isomers
  13. Early symptoms of acute radiation syndrome include

    1. leukopenia

    2. nausea and vomiting

    3. cataracts






     
    1 and 2 only 



     
    2 only 



     
    1 and 3 only 



     
    2 and 3 only
    •  
    •  
    • 1 and 2 only
  14. How are LET and biologic response related?




     
    They are inversely related. 



     
    They are directly related. 



     
    They are related in a reciprocal fashion. 



     
    They are unrelated.
    •  
    •  
    • They are directly related.
  15. What is used to account for the differences in ionizing characteristics of various radiations, when determining their effect on biologic material?















    1. Radiation weighting factors ( W )
    2. Tissue weighting factors ( W )
    3. Absorbed dose






     
    1 only 



     
    1 and 2 only 



     
    2 and 3 only 



     
    1, 2, and 3
    •  
    •  
    • 1 only
  16. Which interaction between x-ray photons and matter results in total absorption of the incident photon?




     
    Photoelectric effect 



     
    Compton scattering 



     
    Coherent scattering 



     
    Pair production
    •  
    •  
    • Photoelectric effect
  17. The dose of radiation that will cause a noticeable skin reaction is referred to as the




     
    LET 



     
    SSD 



     
    SED 



     
    SID
    •  
    •  
    • SED
  18. Stochastic effects of radiation include




     
    blood changes 



     
    genetic alterations 



     
    cataractogenesis 



     
    reduced fertility
    •  
    •  
    • genetic alterations
  19. Stochastic effects of radiation are nonthreshold and randomly occurring. Examples of stochastic effects include carcinogenesis and genetic effects. The chance of occurrence of stochastic effects is directly related to the radiation dose; that is, as radiation dose increases, there is a greater likelihood of genetic alterations or development of cancer. Nonstochasticeffects are predictable threshold responses; that is, a certain quantity of radiation must be received before the effect will occur, and the greater the dose, the more severe is the effect.
  20. Which of the following is (are) considered long-term somatic effect(s) of exposure to ionizing radiation?

    1. Life-span shortening

    2. Carcinogenesis

    3. Cataractogenesis






     
    1 only 



     
    1 and 2 only 



     
    2 and 3 only 



     
    1, 2, and 3
    •  
    •  
    • 1, 2, and 3
  21. The symbols  and  are examples of which of the following?




     
    Isotopes 



     
    Isobars 



     
    Isotones 



     
    Isomers
    •  
    •  
    • Isotopes
  22. Stochastic effects of radiation are those that

    1. have a threshold

    2. may be described as “all-or-nothing” effects

    3. are late effects






     
    1 only 



     
    1 and 2 only 



     
    2 and 3 only 



     
    1, 2, and 3
    •  
    •  
    • 2 and 3 only
  23. Isotopes are atoms that have the same




     
    mass number but a different atomic number 



     
    atomic number but a different mass number 



     
    mass number but a different neutron number 



     
    atomic number and mass number
    •  
    •  
    • atomic number but a different mass number
  24. In radiation protection, the product of absorbed dose and the correct modifying factor (rad × QF) is used to determine




     
    roentgen (C/kg) 



     
    rem (Sv) 



     
    curie (Cu) 



     
    radiation quality
    •  
    •  
    • rem (Sv)
  25. Which of the following terms refers to the period between conception and birth?




     
    Gestation 



     
    Congenital 



     
    Neonatal 



     
    In vitro
    •  
    •  
    • Gestation
  26. Which of the following is (are) possible long-term somatic effects of radiation exposure?

    1. Blood changes

    2. Cataractogenesis

    3. Embryologic effects






     
    1 only 



     
    1 and 2 only 



     
    2 and 3 only 



     
    1, 2, and 3
    •  
    •  
    • 2 and 3 only

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