Which statement about factors that influence radiosensitivity?

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Multiple Choice

Which statement about factors that influence radiosensitivity?

Radiosensitivity depends on multiple cellular characteristics, not a single trait. According to the principle often taught in radiobiology, cells are more sensitive when they are less differentiated, proliferate rapidly, and have high metabolic activity. High mitotic activity means many cells are in vulnerable phases of the cell cycle when radiation can cause lethal DNA damage. If cells are less differentiated, they tend to have less specialized DNA repair control and more potential targets for radiation-induced injury. Metabolic activity relates to how actively the cell processes energy and generates reactive chemical species during irradiation, which can amplify DNA damage. Because all three factors—mitotic activity, differentiation, and metabolism—play roles, none of them alone fully determines radiosensitivity.

Radiosensitivity depends on multiple cellular characteristics, not a single trait. According to the principle often taught in radiobiology, cells are more sensitive when they are less differentiated, proliferate rapidly, and have high metabolic activity. High mitotic activity means many cells are in vulnerable phases of the cell cycle when radiation can cause lethal DNA damage. If cells are less differentiated, they tend to have less specialized DNA repair control and more potential targets for radiation-induced injury. Metabolic activity relates to how actively the cell processes energy and generates reactive chemical species during irradiation, which can amplify DNA damage. Because all three factors—mitotic activity, differentiation, and metabolism—play roles, none of them alone fully determines radiosensitivity.

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