Under age-related sensitivity to radiation, which statement is true?

Under age-related sensitivity to radiation, which statement is true?

• A. Children are more radiosensitive
• B. Adults are more radiosensitive
• C. Children and adults are equally radiosensitive
• D. Age has no effect on sensitivity

Answer: (A)

Age influences how tissues respond to ionizing radiation; younger patients are more radiosensitive. This is because in children many tissues are rapidly dividing and still developing, such as growth plates, bone marrow, and organs. Rapidly dividing cells are more vulnerable to DNA damage from radiation, and any damage can propagate as cells continue to divide. Additionally, children have more years ahead for potential radiation effects to manifest, including cancer or genetic effects, so the overall risk per unit dose is higher in kids. Therefore, the statement that children are more radiosensitive is the best answer. The other options contradict these biological realities: adults are not more radiosensitive, sensitivity is not equal across ages, and age does influence sensitivity.

Age influences how tissues respond to ionizing radiation; younger patients are more radiosensitive. This is because in children many tissues are rapidly dividing and still developing, such as growth plates, bone marrow, and organs. Rapidly dividing cells are more vulnerable to DNA damage from radiation, and any damage can propagate as cells continue to divide. Additionally, children have more years ahead for potential radiation effects to manifest, including cancer or genetic effects, so the overall risk per unit dose is higher in kids. Therefore, the statement that children are more radiosensitive is the best answer. The other options contradict these biological realities: adults are not more radiosensitive, sensitivity is not equal across ages, and age does influence sensitivity.