Cell radiosensitivity is described by which law?

Cell radiosensitivity is described by which law?

• A. Reciprocity law
• B. Inverse square law
• C. Ohm's law
• D. Law of Bergonié and Tribondeau

Answer: (D)

Radiosensitivity depends on how differentiated a cell is and how actively it divides. The Law of Bergonié and Tribondeau states that cells that are poorly differentiated, actively proliferating, and have a long future in which they can divide are most sensitive to radiation. In contrast, mature, specialized cells with limited capacity to divide are more resistant. This helps explain why tissues with many rapidly dividing cells—like bone marrow, intestinal lining, and germinal epithelium—are particularly radiosensitive, while nerve tissue and mature muscle are relatively radioresistant. Keep in mind that other factors like the cell cycle stage, oxygen levels, and dose rate also influence sensitivity, but this law captures the fundamental relationship between a cell’s differentiation and its susceptibility to radiation damage.

Radiosensitivity depends on how differentiated a cell is and how actively it divides. The Law of Bergonié and Tribondeau states that cells that are poorly differentiated, actively proliferating, and have a long future in which they can divide are most sensitive to radiation. In contrast, mature, specialized cells with limited capacity to divide are more resistant. This helps explain why tissues with many rapidly dividing cells—like bone marrow, intestinal lining, and germinal epithelium—are particularly radiosensitive, while nerve tissue and mature muscle are relatively radioresistant. Keep in mind that other factors like the cell cycle stage, oxygen levels, and dose rate also influence sensitivity, but this law captures the fundamental relationship between a cell’s differentiation and its susceptibility to radiation damage.