Final LRA 215
As LET _____, the RBE _____. - Answer-increases, increases
Tissue is_____ radiosensitive under high oxygen conditions and ____ radiosensitive under hypoxic
conditions - Answer-more, less
Tissues that are _____ with a _____ metabolic rate are more radiosensitive. - Answer-immature, high
If a response to radiation is expected, no matter how small the dose, then that dose-response is _____. -
Answer-nonthreshold
The human application of radioprotective agents would - Answer-be fatally toxic
The possible beneficial effect of a small amount of radiation is called _______ - Answer-hormesis
A_____response to radiation is directly proportional to the dose received - Answer-linear
Radiation induced genetic damage follows a____ dose-response relationship - Answer-linear-
nonthreshold
The RBE of diagnostic x-rays is equal to __ - Answer-1
Human cells cannot recover from radiation damage after there is___ - Answer-interphase death
Studies of the effects of radiation show that low doses may____ - Answer-Stimulate the immune system
, Extend lifespan
Stimulate hormonal responses
A dose of 10Gy given to a patient in 5 doses of 2Gy per day is a ____dose - Answer-fractionated dose
The LET of diagnostic x-ray is____keV/um. - Answer-3.0
_____is a measure of the rate that energy is transferred from ionizing radiation to soft tissue - Answer-
LET
Which dose response relationship can follow a sigmoid curve? - Answer-Nonlinear-threshold
Fractionation and protraction are used for radiation therapy because they allow the patient to____ -
Answer-Recover between doses
Have higher total doses
Repair damaged tissues
The human dose-response relationship at low ranges of radiation is calculated using____ - Answer-
Extrapolation form high ranges
A protracted dose of radiation is given______ - Answer-over a long period of time
The law of_____states that the radiosensitivity of living tissue is a function of the metabolism and
maturation of that tissue - Answer-Bergonie and Tribondue
Humans are the most radiosensitive during_____ - Answer-Fetal stages
As LET _____, the RBE _____. - Answer-increases, increases
Tissue is_____ radiosensitive under high oxygen conditions and ____ radiosensitive under hypoxic
conditions - Answer-more, less
Tissues that are _____ with a _____ metabolic rate are more radiosensitive. - Answer-immature, high
If a response to radiation is expected, no matter how small the dose, then that dose-response is _____. -
Answer-nonthreshold
The human application of radioprotective agents would - Answer-be fatally toxic
The possible beneficial effect of a small amount of radiation is called _______ - Answer-hormesis
A_____response to radiation is directly proportional to the dose received - Answer-linear
Radiation induced genetic damage follows a____ dose-response relationship - Answer-linear-
nonthreshold
The RBE of diagnostic x-rays is equal to __ - Answer-1
Human cells cannot recover from radiation damage after there is___ - Answer-interphase death
Studies of the effects of radiation show that low doses may____ - Answer-Stimulate the immune system
, Extend lifespan
Stimulate hormonal responses
A dose of 10Gy given to a patient in 5 doses of 2Gy per day is a ____dose - Answer-fractionated dose
The LET of diagnostic x-ray is____keV/um. - Answer-3.0
_____is a measure of the rate that energy is transferred from ionizing radiation to soft tissue - Answer-
LET
Which dose response relationship can follow a sigmoid curve? - Answer-Nonlinear-threshold
Fractionation and protraction are used for radiation therapy because they allow the patient to____ -
Answer-Recover between doses
Have higher total doses
Repair damaged tissues
The human dose-response relationship at low ranges of radiation is calculated using____ - Answer-
Extrapolation form high ranges
A protracted dose of radiation is given______ - Answer-over a long period of time
The law of_____states that the radiosensitivity of living tissue is a function of the metabolism and
maturation of that tissue - Answer-Bergonie and Tribondue
Humans are the most radiosensitive during_____ - Answer-Fetal stages
