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Questions and Answers
What is the unit of the effective dose of ionizing radiation?
What is the unit of the effective dose of ionizing radiation?
- Sievert (Sv) (correct)
- Roentgen equivalent man (rem)
- Gray (Gy)
- Becquerel (Bq)
What is the primary mechanism by which ionizing radiation causes indirect effects on biological molecules?
What is the primary mechanism by which ionizing radiation causes indirect effects on biological molecules?
- Increasing the kinetic energy of biological molecules
- Directly breaking chemical bonds in biological macromolecules
- Exciting electrons in biological molecules to higher energy states
- Ionizing water molecules to form free radicals that interact with biological molecules (correct)
Which of the following is NOT a tissue weighting factor (WT) used to calculate the effective dose of ionizing radiation?
Which of the following is NOT a tissue weighting factor (WT) used to calculate the effective dose of ionizing radiation?
- Gonads
- Bladder
- Salivary glands
- Brain (correct)
What was the first recorded biological effect of radiation described by Becquerel?
What was the first recorded biological effect of radiation described by Becquerel?
Which of the following is NOT a potential source of ionizing radiation exposure mentioned in the text?
Which of the following is NOT a potential source of ionizing radiation exposure mentioned in the text?
What is the primary mechanism by which ionizing radiation causes direct effects on biological molecules?
What is the primary mechanism by which ionizing radiation causes direct effects on biological molecules?
Which type of effects caused by x-rays do not have a threshold for expression?
Which type of effects caused by x-rays do not have a threshold for expression?
What is the primary reason for about 2/3 of the biological damage caused by x-rays?
What is the primary reason for about 2/3 of the biological damage caused by x-rays?
Which process leads to the formation of hydrogen and hydroxyl free radicals during x-ray exposure in the human body?
Which process leads to the formation of hydrogen and hydroxyl free radicals during x-ray exposure in the human body?
What percentage of the biologic effects of x-ray exposure result from indirect effects?
What percentage of the biologic effects of x-ray exposure result from indirect effects?
Which type of effects demonstrate a threshold for expression due to radiation dose/dose rate?
Which type of effects demonstrate a threshold for expression due to radiation dose/dose rate?
What is the term used to describe sublethal damage to individual cells that results in cancer formation or heritable mutation?
What is the term used to describe sublethal damage to individual cells that results in cancer formation or heritable mutation?
Which of the following is an example of a deterministic effect of radiation?
Which of the following is an example of a deterministic effect of radiation?
What principle emphasizes minimizing exposure to ionizing radiation in dental procedures?
What principle emphasizes minimizing exposure to ionizing radiation in dental procedures?
In the context of radiation safety, what does ALARA stand for?
In the context of radiation safety, what does ALARA stand for?
What effect does the replication of mutated cells following DNA damage typically lead to?
What effect does the replication of mutated cells following DNA damage typically lead to?
Which of the following is an example of an indirect effect of radiation exposure on oral tissues?
Which of the following is an example of an indirect effect of radiation exposure on oral tissues?
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