Radiation Protection 3

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  1. Possible responses to irradiation in utero include

    1. spontaneous abortion

    2. congenital anomalies

    3. childhood malignancies





    A
     
    1 only 


    B
     
    1 and 2 only 


    C
     
    2 and 3 only 


    D
     
    1, 2, and 3 only
    • Image Upload 1
    •  
    • D
    •  
    • 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.





    A
     
    1 only 


    B
     
    1 and 2 only 


    C
     
    2 and 3 only 


    D
     
    1, 2, and 3
    • Image Upload 2
    •  
    • B
    •  
    • 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





    A
     
    1 only 


    B
     
    1 and 2 only 


    C
     
    2 and 3 only 


    D
     
    1, 2, and 3
    • Image Upload 3
    •  
    • B
    •  
    • 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



    A
     
    attenuation 


    B
     
    absorption 


    C
     
    scattered radiation 


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



    A
     
    skin erythema 


    B
     
    hematologic depression 


    C
     
    radiation lethality 


    D
     
    leukemia
    • Image Upload 4
    •  
    • D
    •  
    • 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





    A
     
    1 only 


    B
     
    1 and 2 only 


    C
     
    2 and 3 only 


    D
     
    1, 2, and 3
    • Image Upload 5
    •  
    • D
    •  
    • 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?



    A
     
    Linear threshold 


    B
     
    Linear nonthreshold 


    C
     
    Nonlinear threshold 


    D
     
    Nonlinear nonthreshold
    • Image Upload 6
    •  
    • B
    •  
    • 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 


    B
     
    the incident photon is deflected, with resulting energy loss 


    C
     
    the incident electron ejects an inner-shell tungsten electron 


    D
     
    the incident electron is deflected, with resulting energy loss
    • Image Upload 7
    •  
    • D
    •  
    • 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?



    A
     
    Leukemia 


    B
     
    Temporary infertility 


    C
     
    Erythema 


    D
     
    Acute radiation lethality
    • Image Upload 8
    •  
    • A
    •  
    • 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.





    A
     
    1 only 


    B
     
    1 and 2 only 


    C
     
    2 and 3 only 


    D
     
    1, 2, and 3
    • Image Upload 9
    •  
    • D
    •  
    • 1, 2, and 3
  21. delivered in portions
    (fractionation)
  22. delivered over a length of time (protraction),
    (protraction),
Author
ID
302825
Card Set
Radiation Protection 3
Description
Biological aspects of radiation
Updated
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