Chapter 34 Rad Protection
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dose-response relationship for radiation-induced cataracts is_____,
threshold dose for radiation
induced cataracts is 200 rad or ___ Gy
most radiosensitive area of head is the eyes – is the
Studies of large numbers of people exposed to a toxic substances
Epidemiologic studies of people exposed to radiation are difficult because
(1) the dose usually is not known but is presumed to be low, and
(2) the frequency of response is very low. Consequently, the results of radiation epidemiologic studies do not convey the statistical accuracy associated with observations of stochastic radiation effect
The study of chromosome damage from radiation exposure is called
is the dose response relationship for radiation induced leukemia
linear and nonthreshold
induced skin cancer is not a threshold dose relationship
True or false
Low-dose, chronic irradiation impairs fertility.
True or False
When is the most
radiosensitive time of pregnancy?
the first trimester
What is the all or nothing
response in regards to exposure during pregnancy?
Either a radiation-induced abortion occurs, or the pregnancy is carried to term with no ill effect.
…as dose increases, the severity/harshness/seriousness of a specific effect increases this is what kind of effect
The stochastic dose-response relationship is linear.
True or False
are the 4 somatic and genetic damage factors?
- 1- the quantity of iodoizing radiation patient is exposed to
- 2-the ability of ionizing radiation to cause ionization of tissue
- 3- Amount of body area exposed
- 4- BODY PART EXPOSED
Late effects that can be directly related to the dose received and occur months or years after a high-level radiation exposure are classified as
late nonstochastic (deterministic) somatic effects.
______are those observed within 3 months of exposure and are associated with relatively high radiation doses (greater than 50 cGy).
______ effects are those that affect the body of the irradiated individual directly
______ effects occur as a result of damage to the reproductive cells of the irradiated person and may be observed as defects in the children or grandchildren of the irradiated individual.
________ effects occur only after a certain amount of exposure has been received, and the severity of the effect depends on the dose.
_______ radiation effects are short-term somatic effects associated with high-dose exposure. They are predictable and their severity is dose dependent.
_______ radiation effects are random long-term effects associated with low-dose exposure. Likelihood is dose dependent, and the severity of the effect is random.
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