Question 1

The theory of radiation hormesis suggests that radiation doses below 0.1 mGy are _____.

Accepted Answer

A)   carcinogenic
B)   beneficial
C)   lethal
D)   harmfulE) A) and B)
F) A) and C)

Question 2

A study of an irradiated population which showed a relative risk factor below 1.0 would indicate that the population had a _____ risk.

Accepted Answer

A)   slight
B)   no
C)   reduced
D)   very highE) All of the above
F) A) and C)

Question 3

Low doses of radiation have been shown to cause _____.

Accepted Answer

A)   chromosome damage
B)   loss of fertility
C)   cataracts
D)   radiodermatitisE) All of the above
F) A) and B) A

Question 4

An epidemiological study of the stochastic effects of very low doses of radiation requires a population of _____ of people.

Accepted Answer

A)   millions
B)   thousands
C)   hundreds
D)   dozensE) None of the above
F) A) and D)

Question 5

Radiation-induced leukemia has a latent period of _____ years.

Accepted Answer

A)   1-2
B)   4-7
C)   5-10
D)   15-20E) B) and C)
F) A) and B)

Question 6

Data showing radiation-induced human genetic abnormalities _____.

Accepted Answer

A)   does not exist
B)   indicates responses to low doses
C)   indicates responses to high doses
D)   is being studied by the BEIRE) None of the above
F) A) and B)

Question 7

Our information on the genetic effects of radiation has come from studies of _____.

Accepted Answer

A)   mice
B)   fruit flies
C)   humans
D)   both A and BE) B) and D)
F) B) and C)

Question 8

Chronic low doses of radiation have _____ effect on fertility.

Accepted Answer

A)   no
B)   an increasing
C)   a strong
D)   a weakE) C) and D)
F) All of the above

Question 9

The most radiosensitive period during pregnancy for radiation induced congenital abnormalities is during the _____.

Accepted Answer

A)   first 2 weeks
B)   first trimester
C)   second trimester
D)   third trimesterE) A) and B)
F) A) and C)

Question 10

Ankylosing spondylitis patients treated with radiation showed an increased incidence of _____.

Accepted Answer

A)   leukemia
B)   cancer
C)   early death
D)   infertilityE) B) and C)
F) C) and D)

Question 11

Radiation protection guidelines are based on _____.

Accepted Answer

A)   stochastic effects of radiation
B)   deterministic effects of radiation
C)   lethal effects of radiation
D)   both A and BE) A) and D)
F) B) and C)

Question 12

Studies of A-bomb survivors indicate that leukemia has a _____ dose-response relationship to radiation.

Accepted Answer

A)   nonlinear, threshold
B)   linear, threshold
C)   linear, nonthreshold
D)   nonlinear, nonthresholdE) A) and B)
F) A) and C)

Question 13

The threshold dose for cataract formation is known to be _____ mSv of acute exposure to the eyes.

Accepted Answer

A)   2
B)   4
C)   10
D)   20E) A) and C)
F) A) and D)

Question 14

People who had radiation treatments to their thymus gland as children later showed excess risk for _____.

Accepted Answer

A)   bone cancers
B)   skin cancers
C)   leukemia
D)   thyroid cancersE) All of the above
F) B) and D)

Question 15

A _____ effect increases in incidence but not severity as the dose increases.

Accepted Answer

A)   non-stochastic
B)   stochastic
C)   deterministic
D)   localizedE) B) and C)
F) None of the above

Question 16

Radiation induced skin cancer in radiotherapy patients has occurred with _____.

Accepted Answer

A)   a threshold dose-response
B)   a nonthreshold dose-response
C)   100% of the patients treated
D)   50% of the patients treatedE) B) and C)
F) A) and D)

Question 17

_____ is a stochastic effect of radiation exposure.

Accepted Answer

A)   Erythema
B)   Epilation
C)   Cancer
D)   NauseaE) None of the above
F) All of the above C

Question 18

People who were employed painting radium watch dials later showed excess risk for _____ cancer.

Accepted Answer

A)   bone
B)   stomach
C)   thyroid
D)   mouthE) All of the above
F) C) and D)

Question 19

Relative risk is _____.

Accepted Answer

A)   expected cases/observed cases
B)   observed cases/expected cases
C)   observed cases - expected cases
D)   expected cases - observed casesE) A) and C)
F) A) and B) B

Question 20

It is difficult to link cancer to radiation exposure because it occurs _____ in the population.

Accepted Answer

A)   with severity
B)   very rarely
C)   in high proportion
D)   only in the elderlyE) All of the above
F) C) and D)

Exam 34: Stochastic Effects of Radiation

The theory of radiation hormesis suggests that radiation doses below 0.1 mGy are _____.

Correct AnswerverifiedShow Answer

A study of an irradiated population which showed a relative risk factor below 1.0 would indicate that the population had a _____ risk.

Correct AnswerverifiedShow Answer

Low doses of radiation have been shown to cause _____.

Correct AnswerverifiedA

An epidemiological study of the stochastic effects of very low doses of radiation requires a population of _____ of people.

Correct AnswerverifiedShow Answer

Radiation-induced leukemia has a latent period of _____ years.

Correct AnswerverifiedShow Answer

Data showing radiation-induced human genetic abnormalities _____.

Correct AnswerverifiedShow Answer

Our information on the genetic effects of radiation has come from studies of _____.

Correct AnswerverifiedShow Answer

Chronic low doses of radiation have _____ effect on fertility.

Correct AnswerverifiedShow Answer

The most radiosensitive period during pregnancy for radiation induced congenital abnormalities is during the _____.

Correct AnswerverifiedShow Answer

Ankylosing spondylitis patients treated with radiation showed an increased incidence of _____.

Correct AnswerverifiedShow Answer

Radiation protection guidelines are based on _____.

Correct AnswerverifiedShow Answer

Studies of A-bomb survivors indicate that leukemia has a _____ dose-response relationship to radiation.

Correct AnswerverifiedShow Answer

The threshold dose for cataract formation is known to be _____ mSv of acute exposure to the eyes.

Correct AnswerverifiedShow Answer

People who had radiation treatments to their thymus gland as children later showed excess risk for _____.

Correct AnswerverifiedShow Answer

A _____ effect increases in incidence but not severity as the dose increases.

Correct AnswerverifiedShow Answer

Radiation induced skin cancer in radiotherapy patients has occurred with _____.

Correct AnswerverifiedShow Answer

_____ is a stochastic effect of radiation exposure.

Correct AnswerverifiedC

People who were employed painting radium watch dials later showed excess risk for _____ cancer.

Correct AnswerverifiedShow Answer

Relative risk is _____.

Correct AnswerverifiedB

It is difficult to link cancer to radiation exposure because it occurs _____ in the population.

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
A

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
C

Correct Answer
verified

Correct Answer
verified
B

Correct Answer
verified