RADT 1200 Test Review Questions and Revised Answers All Correct
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RADT 1200
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RADT 1200
RADT 1200 Test Review Questions and Revised Answers All Correct
The 1980 BEIR report revealed that the majority of stochastic effects and genetic effects at low dose levels from low-LET radiation appear to follow what type of curve? - Answer-linear quadratic non-threshold dose response curve
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radt 1200 test review questions and revised answer
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RADT 1200 Test Review Questions
and Revised Answers All Correct
The 1980 BEIR report revealed that the majority of stochastic effects and genetic effects
at low dose levels from low-LET radiation appear to follow what type of curve? -
Answer-linear quadratic non-threshold dose response curve
The 1990 BEIR report suggested that radiation exposure and associated risk be
represented by which curve? - Answer-linear nonthreshold
The _____________ curve implies that the biological response to ionizing radiation is
directly proportional to the dose. - Answer-linear nonthreshold
Non-stochastic effects of signification radiation exposure such as skin erythema and
hematologic depression may be demonstrated graphically through the use of which
curve? - Answer-linear threshold curve
_________________ effects are those that appear months or years after exposure to
ionizing radiation. - Answer-late somatic
Late effects that can be directly related to the dose received and occur months to years
after a high-level radiation exposure are classified as ? - Answer-non-stochastic effects
The 3 major types of late somatic effects are: - Answer-carcinogenesis,
cataractogenesis and embryologic effects
The _______ model predicts that a specific number of excess cancers will occur as a
result of exposure. - Answer-absolute risk
The ________ model predicts that the number of excess cancers will increase as the
natural incidence of cancer increases with advancing age in population. - Answer-
relative risk
_________ is the most important late stochastic effec caused by exposure to ionizing
radiation. - Answer-cancer
Based on data collected, a slightly higher risk of dying from any type of cancer was
found in techs who began working before what year? - Answer-1940
The stage of gestation that corresponds to 0-9 days after conception is called ? -
Answer-preimplantation
, During which trimester is the embryo-fetus considered to be the most susceptible to
damage from radiaiton? - Answer-first
When does organogenesis occur? - Answer-10 days post conception - 12 weeks
postconception
__________- is the radiaiton dose that causes the number of spontaneous mutation
occurring in a given generation to increase in two times their original number. - Answer-
doubling dose
When biologic effects of radiation occur relatively soon after humans receive high doses
of ionizing radiation, the biologic responses demonstrated are referred to as ? - Answer-
early effects
the term _______ originates from the Greek term "soma" which means body. - Answer-
somatic
__________- effects are effects upon the body that was irradiated. - Answer-somatic
_________ effects are effects upon a future generation due to the irradiation of germ
cells in previous generations. - Answer-genetic
If the consequences of irradiation include cell killing and are directly related to the dose
received, they are termed _______________ reactions. - Answer-somatic tissue
AS the radiation dose increases, the severity of early somatic tissue reactions
__________ - Answer-increases
Early tissue reactions appear within : - Answer-minutes, hours, days or weeks
___________-- is the medical term that defines a collection of symptoms - Answer-
syndrome
Name the 3 syndromes that are part of Acute Radiation Syndrome (ARS). - Answer-
hematopoietic, gastrointestinal and cerebrovascular
The hematopoietic syndrom occurs from exposures that range from ____ Gy to ____
Gy. - Answer-1-10
The gastrointestinal syndrome occurs at a threshold dose of approximately ___ Gy and
peaks after a dose of ___ Gy. - Answer-6-10
What aspect of the gastrointestinal system is the most severely affected from exposure
to radiation? - Answer-small intestine
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