Radiation Protection & Biology Final Test Questions and Answers With Verified
Solutions 2025
Death from acute radiation exposure follows a _______ dose-response relationship.
a) stochastic
b) non-threshold
c) threshold
d) non-somatic - ✔✔c) threshold
What type of dose-response curve (graph) is used as the basis of all radiation protections problems?
a) Linear, Non-Threshold
b) Non-Linear, Non-Threshold
c) Linear, Threshold
d) Non-Linear, Threshold - ✔✔a) Linear, Non-Threshold
What is the extra measure of caution built into diagnostic radiation protection standards?
a) Assume biological response is directly proportional to increased dose.
b) Assume diagnostic radiation remains below any known threshold.
c) Keep dose to 50% of any known threshold.
d) Assume biologic response is independent of dose. - ✔✔a) Assume biological response is directly
proportional to increased dose.
The most radiosensitive period during pregnancy is ____.
a) second trimester
b) third trimester
c) first trimester - ✔✔c) first trimester
,Radiation-induced leukemia has a latent period of approximately ________.
a) 1 month
b) 20 years
c) 5 years
d) 1 year - ✔✔c) 5 years
Hemorrhage of small blood vessels in the brain is associated with which of the following?
a) Hematopoietic syndrome
b) Gastrointestinal syndrome
c) Cerebrovascular syndrome
d) Genetic cell destruction - ✔✔c) Cerebrovascular syndrome
Uranium miners in the Colorado plateau who developed lung cancer years after exposure are an
example of which of the following?
a) Early stochastic somatic effects
b) Late stochastic somatic effects
c) Late non-stochastic somatic effects
d) Early non-stochastic somatic effects - ✔✔b) Late stochastic somatic effects
What type of graph in Non-Linear Probabilistic?
a) Non-Linear, Non-Threshold
b) Non-Linear, Threshold
c) Linear, Non-Threshold
d) Linear, Threshold - ✔✔a) Non-Linear, Non-Threshold
,In theory, what impact does exposure to ionizing radiation have on the occurrence of genetic effects?
a) Radiation exposure decreases the likelihood of these genetic effects.
b) There is no effect.
c) Radiation exposure increases the likelihood of these genetic effects. - ✔✔c) Radiation exposure
increases the likelihood of these genetic effects.
The term LD 30/50, denotes the radiation dose required to kill which of the following?
a) 30% of the exposed population in 30 days
b) 50% of the exposed population in 50 days
c) 30% of the exposed population in 50 days
d) 50% of the exposed population in 30 days - ✔✔c) 30% of the exposed population in 50 days
When a prediction is made that the percentage of excess cancers in a given population will remain
constant as the natural incidence of cancer increases, the risk is described by which of the following
terms?
a) Quadratic
b) Excess
c) Absolute
d) Relative - ✔✔c) Absolute
What type of graph is Linear, Non-Stochastic?
a) Non-Linear, Threshold
b) Linear, Threshold
c) Non-Linear, Non-Threshold
d) Linear, Non-Threshold - ✔✔b) Linear, Threshold
, Which of the following is not a form of acute radiation syndrome?
a) Gastrointestinal syndrome
b) Carcinogenic syndrome
c) Hematopoietic syndrome
d) Cerebrovascular syndrome - ✔✔b) Carcinogenic syndrome
The stage of acute radiation syndrome in which there are no visible symptoms is celled:
a) Recovery period
b) Latent period
c) Initial stage
d) Manifest illness period - ✔✔b) Latent period
What would be the most likely immediate response to a whole body dose of 2 Gy?
a) convulsive seizures and edema
b) diarrhea, nausea, and vomiting
c) increased strength
d) a sense of well-being - ✔✔b) diarrhea, nausea, and vomiting
Radiation-induced solid cancer (tumor) has a latent period of approximately _____.
a) 20 years
b) 1 year
c) 1 month
d) 5 years - ✔✔a) 20 years
Solutions 2025
Death from acute radiation exposure follows a _______ dose-response relationship.
a) stochastic
b) non-threshold
c) threshold
d) non-somatic - ✔✔c) threshold
What type of dose-response curve (graph) is used as the basis of all radiation protections problems?
a) Linear, Non-Threshold
b) Non-Linear, Non-Threshold
c) Linear, Threshold
d) Non-Linear, Threshold - ✔✔a) Linear, Non-Threshold
What is the extra measure of caution built into diagnostic radiation protection standards?
a) Assume biological response is directly proportional to increased dose.
b) Assume diagnostic radiation remains below any known threshold.
c) Keep dose to 50% of any known threshold.
d) Assume biologic response is independent of dose. - ✔✔a) Assume biological response is directly
proportional to increased dose.
The most radiosensitive period during pregnancy is ____.
a) second trimester
b) third trimester
c) first trimester - ✔✔c) first trimester
,Radiation-induced leukemia has a latent period of approximately ________.
a) 1 month
b) 20 years
c) 5 years
d) 1 year - ✔✔c) 5 years
Hemorrhage of small blood vessels in the brain is associated with which of the following?
a) Hematopoietic syndrome
b) Gastrointestinal syndrome
c) Cerebrovascular syndrome
d) Genetic cell destruction - ✔✔c) Cerebrovascular syndrome
Uranium miners in the Colorado plateau who developed lung cancer years after exposure are an
example of which of the following?
a) Early stochastic somatic effects
b) Late stochastic somatic effects
c) Late non-stochastic somatic effects
d) Early non-stochastic somatic effects - ✔✔b) Late stochastic somatic effects
What type of graph in Non-Linear Probabilistic?
a) Non-Linear, Non-Threshold
b) Non-Linear, Threshold
c) Linear, Non-Threshold
d) Linear, Threshold - ✔✔a) Non-Linear, Non-Threshold
,In theory, what impact does exposure to ionizing radiation have on the occurrence of genetic effects?
a) Radiation exposure decreases the likelihood of these genetic effects.
b) There is no effect.
c) Radiation exposure increases the likelihood of these genetic effects. - ✔✔c) Radiation exposure
increases the likelihood of these genetic effects.
The term LD 30/50, denotes the radiation dose required to kill which of the following?
a) 30% of the exposed population in 30 days
b) 50% of the exposed population in 50 days
c) 30% of the exposed population in 50 days
d) 50% of the exposed population in 30 days - ✔✔c) 30% of the exposed population in 50 days
When a prediction is made that the percentage of excess cancers in a given population will remain
constant as the natural incidence of cancer increases, the risk is described by which of the following
terms?
a) Quadratic
b) Excess
c) Absolute
d) Relative - ✔✔c) Absolute
What type of graph is Linear, Non-Stochastic?
a) Non-Linear, Threshold
b) Linear, Threshold
c) Non-Linear, Non-Threshold
d) Linear, Non-Threshold - ✔✔b) Linear, Threshold
, Which of the following is not a form of acute radiation syndrome?
a) Gastrointestinal syndrome
b) Carcinogenic syndrome
c) Hematopoietic syndrome
d) Cerebrovascular syndrome - ✔✔b) Carcinogenic syndrome
The stage of acute radiation syndrome in which there are no visible symptoms is celled:
a) Recovery period
b) Latent period
c) Initial stage
d) Manifest illness period - ✔✔b) Latent period
What would be the most likely immediate response to a whole body dose of 2 Gy?
a) convulsive seizures and edema
b) diarrhea, nausea, and vomiting
c) increased strength
d) a sense of well-being - ✔✔b) diarrhea, nausea, and vomiting
Radiation-induced solid cancer (tumor) has a latent period of approximately _____.
a) 20 years
b) 1 year
c) 1 month
d) 5 years - ✔✔a) 20 years
