Radiation Protection & Biology Final Test
Questions with Accurate Answers Graded A+
(2024/2025)
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
Which of the following effect types will increase in severity as the radiation exposure
increases? (select all that apply)
a) Non-somatic
b) Non-stochastic
c) Somatic
d) Stochastic - ✔️✔️b) Non-stochastic
c) Somatic
The central nervous system acute radiation syndrome occurs following a whole body
dose of _______.
Questions with Accurate Answers Graded A+
(2024/2025)
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
Which of the following effect types will increase in severity as the radiation exposure
increases? (select all that apply)
a) Non-somatic
b) Non-stochastic
c) Somatic
d) Stochastic - ✔️✔️b) Non-stochastic
c) Somatic
The central nervous system acute radiation syndrome occurs following a whole body
dose of _______.
