Dental Radiology Chapter 3: Radiation
Biology Questions and Answers Already
Passed
What is the primary effect of ionizing radiation on biological tissues?
✔✔ Damage to cellular DNA
Which type of cell is most sensitive to radiation?
✔✔ Rapidly dividing cells
What is the term used to describe the energy transferred from radiation to tissue?
✔✔ Absorbed dose
What part of the cell is most affected by ionizing radiation?
✔✔ The nucleus
What is the effect of radiation on cells that are in the mitotic phase?
✔✔ Increased sensitivity
1
,What are free radicals in radiation biology?
✔✔ Unstable molecules formed when radiation interacts with water
What is the primary indirect effect of radiation on tissues?
✔✔ Damage caused by free radicals
Why is DNA the primary target for radiation damage in cells?
✔✔ It controls the cell's function and reproduction
What type of radiation damage can be passed on to future generations?
✔✔ Genetic damage
What is the term for the dose of radiation that causes no harm to the patient?
✔✔ Threshold dose
What is the stochastic effect of radiation?
✔✔ The probability of an effect increases with dose, but severity does not
2
,What is the difference between deterministic and stochastic effects?
✔✔ Deterministic effects have a threshold, while stochastic effects do not
What does the term "latent period" refer to in radiation biology?
✔✔ The time between radiation exposure and the appearance of effects
What is the primary long-term effect of radiation exposure?
✔✔ Increased risk of cancer
Why are children more sensitive to radiation than adults?
✔✔ Their cells are dividing more rapidly
What is the term for the total amount of radiation energy absorbed by the body?
✔✔ Radiation dose
What is the unit of measurement for radiation dose in tissues?
✔✔ Gray (Gy)
3
, What is the purpose of the ALARA principle in radiation biology?
✔✔ To minimize radiation exposure
What does ALARA stand for?
✔✔ As Low As Reasonably Achievable
What is the most effective way to reduce radiation exposure to patients?
✔✔ Using proper shielding and minimizing exposure time
What type of radiation interaction occurs when energy is transferred directly to DNA?
✔✔ Direct action
What is a somatic effect of radiation?
✔✔ Damage to the individual exposed, not passed to offspring
What type of radiation effect results in birth defects?
✔✔ Teratogenic effects
4
Biology Questions and Answers Already
Passed
What is the primary effect of ionizing radiation on biological tissues?
✔✔ Damage to cellular DNA
Which type of cell is most sensitive to radiation?
✔✔ Rapidly dividing cells
What is the term used to describe the energy transferred from radiation to tissue?
✔✔ Absorbed dose
What part of the cell is most affected by ionizing radiation?
✔✔ The nucleus
What is the effect of radiation on cells that are in the mitotic phase?
✔✔ Increased sensitivity
1
,What are free radicals in radiation biology?
✔✔ Unstable molecules formed when radiation interacts with water
What is the primary indirect effect of radiation on tissues?
✔✔ Damage caused by free radicals
Why is DNA the primary target for radiation damage in cells?
✔✔ It controls the cell's function and reproduction
What type of radiation damage can be passed on to future generations?
✔✔ Genetic damage
What is the term for the dose of radiation that causes no harm to the patient?
✔✔ Threshold dose
What is the stochastic effect of radiation?
✔✔ The probability of an effect increases with dose, but severity does not
2
,What is the difference between deterministic and stochastic effects?
✔✔ Deterministic effects have a threshold, while stochastic effects do not
What does the term "latent period" refer to in radiation biology?
✔✔ The time between radiation exposure and the appearance of effects
What is the primary long-term effect of radiation exposure?
✔✔ Increased risk of cancer
Why are children more sensitive to radiation than adults?
✔✔ Their cells are dividing more rapidly
What is the term for the total amount of radiation energy absorbed by the body?
✔✔ Radiation dose
What is the unit of measurement for radiation dose in tissues?
✔✔ Gray (Gy)
3
, What is the purpose of the ALARA principle in radiation biology?
✔✔ To minimize radiation exposure
What does ALARA stand for?
✔✔ As Low As Reasonably Achievable
What is the most effective way to reduce radiation exposure to patients?
✔✔ Using proper shielding and minimizing exposure time
What type of radiation interaction occurs when energy is transferred directly to DNA?
✔✔ Direct action
What is a somatic effect of radiation?
✔✔ Damage to the individual exposed, not passed to offspring
What type of radiation effect results in birth defects?
✔✔ Teratogenic effects
4
