RADT 1200 final UPDATED ACTUAL
QUESTIONS and CORRECT Answers
What is the human body primarily composed of? - CORRECT ANSWER - Hydrogen
Most of the RNA is contained within the ______? - CORRECT ANSWER - Nucleolus
Which cell type has the highest radiosensitivity? - CORRECT ANSWER - Lymphocytes
Under what condition is biological material most sensitive to radiation? - CORRECT
ANSWER - Oxygenated
What cell is the least radiosensitive? - CORRECT ANSWER - Nerve cells
The law of Bergonie and Tribondeau states, in part, that: - CORRECT ANSWER - Stem
cells are among the most sensitive to ionizing radiation
A substance that increases the damaging effects of radiation is called a: - CORRECT
ANSWER - Radiosensitizer
The creation of free radicals, due to irradiation of water molecules, with subsequent formation of
hydrogen peroxide, is termed: - CORRECT ANSWER - Radiolysis
"Ionizing radiation strikes a distant molecule, and indirectly affects the DNA" describes what? -
CORRECT ANSWER - Indirect effect
LET of x-rays - CORRECT ANSWER - 3 keV/um
, A _____ response is directly proportional to the dose received. - CORRECT ANSWER -
Linear
What is the effect on RBE as LET increases? - CORRECT ANSWER - As LET increases,
RBE increases
The principle radiation interaction within the human body is with what? - CORRECT
ANSWER - Water
Dose protraction causes what? - CORRECT ANSWER - Less effect because of lower dose
delivery rate
The process of cell meiosis results in cells with how many chromosomes each? - CORRECT
ANSWER - 23
If a response to radiation is expected no matter how small the dose, then that dose response is
______. - CORRECT ANSWER - Non threshold
What is a measure of the rate that energy is transferred from ionizing radiation to soft tissue? -
CORRECT ANSWER - LET
During which trimester is the fetus most radiosensitive? - CORRECT ANSWER - First
What is the range for hematologic syndrome? - CORRECT ANSWER - 2-10 Gyt
What is doubling dose? - CORRECT ANSWER - The amount of radiation that would
increase genetic mutations by 100%
List three sources of data on the incidence of radiation induced cancer. - CORRECT
ANSWER - Radiotherapy patients, atomic bomb survivors, American radiologists
QUESTIONS and CORRECT Answers
What is the human body primarily composed of? - CORRECT ANSWER - Hydrogen
Most of the RNA is contained within the ______? - CORRECT ANSWER - Nucleolus
Which cell type has the highest radiosensitivity? - CORRECT ANSWER - Lymphocytes
Under what condition is biological material most sensitive to radiation? - CORRECT
ANSWER - Oxygenated
What cell is the least radiosensitive? - CORRECT ANSWER - Nerve cells
The law of Bergonie and Tribondeau states, in part, that: - CORRECT ANSWER - Stem
cells are among the most sensitive to ionizing radiation
A substance that increases the damaging effects of radiation is called a: - CORRECT
ANSWER - Radiosensitizer
The creation of free radicals, due to irradiation of water molecules, with subsequent formation of
hydrogen peroxide, is termed: - CORRECT ANSWER - Radiolysis
"Ionizing radiation strikes a distant molecule, and indirectly affects the DNA" describes what? -
CORRECT ANSWER - Indirect effect
LET of x-rays - CORRECT ANSWER - 3 keV/um
, A _____ response is directly proportional to the dose received. - CORRECT ANSWER -
Linear
What is the effect on RBE as LET increases? - CORRECT ANSWER - As LET increases,
RBE increases
The principle radiation interaction within the human body is with what? - CORRECT
ANSWER - Water
Dose protraction causes what? - CORRECT ANSWER - Less effect because of lower dose
delivery rate
The process of cell meiosis results in cells with how many chromosomes each? - CORRECT
ANSWER - 23
If a response to radiation is expected no matter how small the dose, then that dose response is
______. - CORRECT ANSWER - Non threshold
What is a measure of the rate that energy is transferred from ionizing radiation to soft tissue? -
CORRECT ANSWER - LET
During which trimester is the fetus most radiosensitive? - CORRECT ANSWER - First
What is the range for hematologic syndrome? - CORRECT ANSWER - 2-10 Gyt
What is doubling dose? - CORRECT ANSWER - The amount of radiation that would
increase genetic mutations by 100%
List three sources of data on the incidence of radiation induced cancer. - CORRECT
ANSWER - Radiotherapy patients, atomic bomb survivors, American radiologists
