Which statement best describes the relationship between cell differentiation and radiosensitivity?

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Multiple Choice

Which statement best describes the relationship between cell differentiation and radiosensitivity?

Radiosensitivity tracks how actively a cell divides and how differentiated it is. Immature or unspecialized cells are more sensitive to radiation because they proliferate rapidly and often rely less on mature DNA repair mechanisms. When ionizing radiation hits these cells, DNA damage interrupts replication and cell division more easily, leading to cell death or malfunction. In contrast, differentiated cells that divide slowly or not at all have fewer opportunities for radiation to disrupt replication and generally have more stable DNA repair capacities, making them more resistant. This is why tissues with high turnover, like the basal layer of the oral mucosa or bone marrow, are more radiosensitive, while mature, post-mitotic cells are more radioresistant.

Radiosensitivity tracks how actively a cell divides and how differentiated it is. Immature or unspecialized cells are more sensitive to radiation because they proliferate rapidly and often rely less on mature DNA repair mechanisms. When ionizing radiation hits these cells, DNA damage interrupts replication and cell division more easily, leading to cell death or malfunction. In contrast, differentiated cells that divide slowly or not at all have fewer opportunities for radiation to disrupt replication and generally have more stable DNA repair capacities, making them more resistant. This is why tissues with high turnover, like the basal layer of the oral mucosa or bone marrow, are more radiosensitive, while mature, post-mitotic cells are more radioresistant.

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