Chapter 34 Flashcards
Which of the following is the most radiosensitive period for a fetus?
1st trimester
What is the latent period for radiation-induced leukemia?
4 - 7 years
The latent period range for radiation induced cataracts is?
5 - 30 years, with an average of 15 years
The BEIR committee concluded that less than _____ may not be harmful.
0.1 Gy/yr
Radium watch dial painters in the 1920s and 1930s demonstrated which type of cancer?
Bone
Cataracts follow which type of dose response relationship?
nonlinear, threshold
The amount of radiation exposure that causes twice the frequency of a genetic mutation in a population is called?
Doubling Dose
In which of the following populations has Leukemia been observed:
- Radiologists
- Ankylosing Spondylitis Patients
- TB Patients
1 & 2
Which of the following terms describes radiation damage which increases the probability of causing a late effect, but will not increase the severity of the effect?
a. Non-stochastic
b. Congenital
c. Chronic
d. Stochastic
d. Stochastic
A fetus receives .02 Gy of radiation exposure during the first two weeks of gestation and a spontaneous abortion did not result. What would the most likely response would be?
Nothing
What is the minimum radiation dose below which no genetic or cancer effects would occur?
No such levels
Radiation induced skin cancer follows a ___________ dose response relationship.
threshold
What is the best estimate for radiation-induced life-span shortening?
10 days/0.01 Gy
Miners developed lung cancer after being exposed to which type of radiation?
Radon
T/F: Radiation induced mutations are recessive.
True
