Radiation Protection 3

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Anonymous
ID:
302825
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Radiation Protection 3
Updated:
2015-05-16 23:05:20
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rad
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Description:
Biological aspects of radiation
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  1. Possible responses to irradiation in utero include

    1. spontaneous abortion

    2. congenital anomalies

    3. childhood malignancies






     
    1 only 



     
    1 and 2 only 



     
    2 and 3 only 



     
    1, 2, and 3 only
    •  
    •  
    • 1, 2, and 3 only
  2. The late effects of radiation are considered to

    1. have no threshold dose.

    2. be directly related to dose.

    3. occur within hours of exposure.






     
    1 only 



     
    1 and 2 only 



     
    2 and 3 only 



     
    1, 2, and 3
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    • 1 and 2 only
  3. Exposure to high doses of radiation results in ____ effects
    early
  4. Which of the following anomalies is (are) possible if an exposure dose of 40 rad (400 mGy) were delivered to a pregnant uterus in the third week of pregnancy?

    1. Skeletal anomaly

    2. Organ anomaly

    3. Neurologic anomaly






     
    1 only 



     
    1 and 2 only 



     
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    1, 2, and 3
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    • 1 and 2 only
  5. The term used to describe the gradual decrease in exposure rate as an x-ray beam passes through matter is




     
    attenuation 



     
    absorption 



     
    scattered radiation 



     
    secondary radiation
    •  
    •  
    • attenuation
  6. All the following radiation-exposure responses exhibit a nonlinear threshold dose–response relationship except




     
    skin erythema 



     
    hematologic depression 



     
    radiation lethality 



     
    leukemia
    •  
    •  
    • leukemia
  7. The _______/______dose–response curve has a threshold and is thought to be generally correct for most somatic effects—such as skin erythemaepilationhematologic depression, and radiation lethality (death).
    nonlinear/sigmoidal 
  8. Which of the following radiation exposure responses exhibit a nonlinear threshold dose-response relationship?















    1. Skin erythema
    2. Hematologic depression
    3. Lethality






     
    1 only 



     
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    1, 2, and 3
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    • 1, 2, and 3
  9. The genetic effects of radiation and some somatic effects, like leukemia, are plotted on a _____ dose-response curve. 
    linear
  10. Dose The linear dose-response curve have a threshold
    NO
  11. Late or long-term effects of radiation exposure are generally represented by which of the following dose-response curves?




     
    Linear threshold 



     
    Linear nonthreshold 



     
    Nonlinear threshold 



     
    Nonlinear nonthreshold
    •  
    •  
    • Linear nonthreshold
  12. ____ _____ are those that will not occur below a particular threshold dose and that increase in severity as the dose increases
    Nonstochastic effects
  13. _______scatter, a high-energy incident photon uses some of its energy to eject an outer-shell electron. In doing so, the incident photon is deflected with reduced energy, but usually retains most of its original energy and exits the body as an energetic scattered photon. 
    Compton 
  14. In ____ scatter, a low-energy photon interacts with an atom but causes no ionization; the incident photon disappears in the atom, then immediately reappears and is released as a photon of identical energy but changed direction.
    classical
  15. _____ scatter is another name for classical scatter
    Thompson
  16. What occurs when there is partial transfer of the proton's energy to matter, as in the Compton effect.
    Scattering
  17.  What occurs when an x-ray photon interacts with matter and disappears, as in the photoelectric effect. 
    Absorption
  18. cident photon ejects an inner-shell tungsten electron 



     
    the incident photon is deflected, with resulting energy loss 



     
    the incident electron ejects an inner-shell tungsten electron 



     
    the incident electron is deflected, with resulting energy loss
    •  
    •  
    • the incident electron is deflected, with resulting energy loss
  19. Which of the following radiation-induced conditions is most likely to have the longest latent period?




     
    Leukemia 



     
    Temporary infertility 



     
    Erythema 



     
    Acute radiation lethality
    •  
    •  
    • Leukemia
  20. How do fractionation and protraction affect radiation dose effects?

    1. They reduce the effect of radiation exposure.

    2. They permit cellular repair.

    3. They allow tissue recovery.






     
    1 only 



     
    1 and 2 only 



     
    2 and 3 only 



     
    1, 2, and 3
    •  
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    • 1, 2, and 3
  21. delivered in portions
    (fractionation)
  22. delivered over a length of time (protraction),
    (protraction),

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