Radiation Biology Questions and
Answers Already Passed
What happens when radiation exposure is too high for cellular repair mechanisms?
✔✔The cell may die or become cancerous
What type of cells are least sensitive to radiation?
✔✔Mature nerve and muscle cells
What is the primary risk of radiation exposure to the lens of the eye?
✔✔Cataract formation
How does radiation affect red blood cells?
✔✔It reduces their production, leading to anemia
What is the primary defense mechanism against radiation-induced DNA damage?
✔✔Cellular repair enzymes
1
,Which type of radiation exposure is more likely to cause immediate health effects?
✔✔Acute high-dose exposure
What happens to a cell when its radiation-induced damage is not repaired?
✔✔It may undergo apoptosis, become cancerous, or function abnormally
How does radiation affect bone marrow?
✔✔It destroys stem cells, reducing the production of blood cells
Which radiation exposure scenario is most likely to cause genetic mutations?
✔✔Low-dose chronic exposure over time
What is the effect of ionizing radiation on protein synthesis?
✔✔It can disrupt ribosomal function, slowing or stopping protein production
Why are children more sensitive to radiation than adults?
✔✔Their cells divide more rapidly, making them more vulnerable to damage
2
, What is the primary reason why high-LET radiation is more damaging than low-LET radiation?
✔✔It deposits more energy per unit of tissue, causing severe localized damage
How does whole-body radiation exposure affect the nervous system?
✔✔At extremely high doses, it can cause neurological damage and death
What is the primary concern of radiation exposure in pregnant women?
✔✔Potential developmental defects in the fetus
How does radiation affect reproductive cells differently than somatic cells?
✔✔Damage to reproductive cells can lead to genetic mutations passed to offspring
What is the relationship between radiation dose and the severity of deterministic effects?
✔✔Higher doses result in more severe and predictable biological effects
What is the key difference between stochastic and deterministic effects of radiation?
✔✔Stochastic effects occur randomly with no threshold, while deterministic effects have a
threshold dose
3
Answers Already Passed
What happens when radiation exposure is too high for cellular repair mechanisms?
✔✔The cell may die or become cancerous
What type of cells are least sensitive to radiation?
✔✔Mature nerve and muscle cells
What is the primary risk of radiation exposure to the lens of the eye?
✔✔Cataract formation
How does radiation affect red blood cells?
✔✔It reduces their production, leading to anemia
What is the primary defense mechanism against radiation-induced DNA damage?
✔✔Cellular repair enzymes
1
,Which type of radiation exposure is more likely to cause immediate health effects?
✔✔Acute high-dose exposure
What happens to a cell when its radiation-induced damage is not repaired?
✔✔It may undergo apoptosis, become cancerous, or function abnormally
How does radiation affect bone marrow?
✔✔It destroys stem cells, reducing the production of blood cells
Which radiation exposure scenario is most likely to cause genetic mutations?
✔✔Low-dose chronic exposure over time
What is the effect of ionizing radiation on protein synthesis?
✔✔It can disrupt ribosomal function, slowing or stopping protein production
Why are children more sensitive to radiation than adults?
✔✔Their cells divide more rapidly, making them more vulnerable to damage
2
, What is the primary reason why high-LET radiation is more damaging than low-LET radiation?
✔✔It deposits more energy per unit of tissue, causing severe localized damage
How does whole-body radiation exposure affect the nervous system?
✔✔At extremely high doses, it can cause neurological damage and death
What is the primary concern of radiation exposure in pregnant women?
✔✔Potential developmental defects in the fetus
How does radiation affect reproductive cells differently than somatic cells?
✔✔Damage to reproductive cells can lead to genetic mutations passed to offspring
What is the relationship between radiation dose and the severity of deterministic effects?
✔✔Higher doses result in more severe and predictable biological effects
What is the key difference between stochastic and deterministic effects of radiation?
✔✔Stochastic effects occur randomly with no threshold, while deterministic effects have a
threshold dose
3
