The "R"s of radiobiology include the following except:: (A) Repair, (B) Reoxygenation, (C) Repopulation, (D) Reexcitation
Answer is D. Processes after radiation exposure are "4 R's" of radiobiology. Repair - Enzymatic mechanisms for healing intracellular injury. Reoxygenation- Process whereby oxygen is actually better distributed to ble cells following radiation injury and cell killing. Repopulation- Ability of the cell population to continue to divide and to replace dying and dead cells. Redistribution- Reflects the variability of a cell's radiosensitivity over the cell cycle.