Radiation Protection 215 Questions
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| Dose response curves commonly used in radiation protection incl: 1. linear, threshold 2. linear, nonthreshold 3. nonlinear, threshold | 1. linear, threshold and 2. linear, non-threshold
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| All of the following are considered stochastic effects except: a. cancer b. leukemia c. skin erythema d. genetic effects | c. skin erythema
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| Leukemia and genetic effects are associated with which common type of dose-response curve? a. nonlinear, nonthreshold b. linear, nonthreshold c. nonlinear, threshold d. linear, threshold | b. linear, nonthreshold
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| Which common dose-response curve is used to predict the effects of occupational radiation exposure? a. nonlinear threshold b. linear threshold c. nonlinear nonthreshold d. linear nonthreshold | d. linear nonthreshold
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| Cataractogenesis can occur many years later after being exposed to ionizing rad. Which dose-response curve is best represented by this: a. linear threshold b. linear nonthreshold c. nonlinear nonthreshold d. nonlinear threshold | d. nonlinear threshold
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| Longterm effects from occupational exposure to low levels of ionizing radiation is represented by the a. linear threshold b. nonlinear threshold c. linear nonthreshold d. nonlinear nonthreshold | c. linear nonthreshold
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| Which of the following is a characteristic of the linear, nonthreshold curve? 1. all or nothing types of effects 2. stochastic effects 3. there is no dose that is considered harmless | all
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| Which of the following best describes genetic significant dose? a. the average yearly gonadal dose to people of reprod age b. the avg yearly dose to people of non-reprod age c. the avg yearly dose to males age 5 to 10 d. females age 5 to 10 | a. the avg yearly dose to people of reproductive age
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| Carcinogenesis is a late somatic effect that has been usually associated w/ all of the following except: a. occupational exposure b. low exposures c. chronic exposures d. nonstochastic effects | d. nonstochastic effects (acute)
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| Which is true regarding 10-day rule? a. An abd exam can be given from the 1st day of the period to the 10th day after the start of the period. b. abd exam given last day of period to 10 days after c. 10 days after ovulation d. 10 days after end of period | a. An abdomen exam can be given from the 1st day of the menstral period to the 10th day after the start of the period.
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| A dose of 30 rad to a fetus during the 23rd day of the 1st tri of preg will most likely result? a. neurological anomalies b. skeletal anomalies c. organogenesis d. multiple sclerosis | a. neurological anomalies
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| If linear energy transfer rises, the relative biological effectiveness will: a. stay the same b. increase c. decrease d. not be affected | b. increase
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| Which of the following is quite radiosentive according to the Law of Bergonie? 1. immature cells 2. cells that have high proliferation 3. precursor cells | all
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| Increase levels of radiation exposure can cause: 1. decrease in immunity against disease 2. decrease in lymphocytes 3. increase in fertility | all
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| A dose of 35 rad to the fetus in the first week of preg will most likely cause: a. leukemia b. multiple myeloma c. spontaneous abortion d. neurologic anomalies | c. spontaneous abortion
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| Which of the following is considered the most radioresistant somatic tissue in adults? a. nerve cells b. epithelial lining of GI tract c. genetic cells of gonads d. white blood cells | a. nerve cells
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| Which of the following is not sensitive to rad exposure in the adult? a. epithelial lining of respiratory b. epithelial lining of GI tract c. genetic cells of gonads. d. nerve cells | d. nerve cells
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| Radiosensitivity is the least at which of the following ages? a. 80 yr old male b. 85 yr old female c. 34 yr old male d. 3 mo old fetus | c. 34 yr old male
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| Which is not true re rad exp: a. fetal tissue is most sensitive to rad b. more oxygen found in tissue, more it will be affected c. elderly are more sensitive than younger d. Fractionation occurs when high dose of rad is given in the shortest amt of time | d. Fractionation occurs when high dose of rad is given in the shortest amount of time
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| The longer the span of time between subsequent rad doses, the less its effect is most closely referred to: a. quality factor b. fractionation c. linear energy transfer d. Law of Bergonie and Tribondeau | b. fractionation
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| Which is not an indirect molecular effect of rad? a. single-strand break on a DNA molecule from free rad b. double-strand break on DNA molecule from free rad c. mutation d. ionization takes place on the DNA molecule | d. ionization takes place on the DNA molecule
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| Which is associated with indirect molecular effects of radiation? 1. ionization takes place away from DNA molecules 2. double-strand break on a DNA molecule from a free rad 3. single-strand break on a DNA molecule from a free rad | all
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| Which of the following is the least radiosensitive type of tissue? a. epithelial lining of the respiratory tract b. muscle tissue c. epithelial lining of the intesting d. genetic cells located in the gonads | b. muscle tissue
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| Embryologic somatic effects usually do not consist of which of the following? a. leukemia b. microcephaly c. mental retardation d. cataractogenesis | d. cataractogenesis
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| Occupational workers exposed to x-rays are more affected by late somatic effects of the rad. These late somatic effects are: 1. life span shortening 2. carcinogenesis 3. cataractogenesis | all
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| Which curve is used as the most preferred method for rad protection standards? a. linear nonthreshold b. linear threshold c. nonlinear nonthreshold d. nonlinear threshold | a. linear nonthreshold
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| If the relative effectiveness increases, which of the following can be inferred? a. LET decrease b. LET increase c. LET stays the same d. Law of Berg/Trib is responsible for a decrease in LET | b. LET increases
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| Which is primary reason for the 10day rule before giving an abd x-ray? a. 10day period is the time when a female is least likely to be preg b. It is essential not perform exam to prevent infertility c. this 10day period will prevent sterility in males | a. 10day period is the time when a female is least likely to be preg
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| The Law of Bergonie and Tribondeau refers primarily to which of the following concepts? a. the radiosensitivity of young cells b. radioresistant somatic cells c. occupational late effects d. fractionation | a. the radiosensitivity of young cells
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| All of the following are types of beam restrictors except: a. aperture diaphragms b. collimators c. ionization chamber d. cones | c. ionization chamber
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