Chapter 7 Key Terms

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Across
  1. 2. Describes the relative capabilities of radiation with differing linear energy transfers to produce a particular biologic reaction
  2. 6. Electromagnetic radiation can travel and interact with matter in the form of a wave or a particle
  3. 9. A nonmitotic or nondivision form of a cell death that occurs when cells die without attempting division during the interphase portion of the cell life cycle
  4. 10. Solitary atoms, or most often a combination of altered atoms, that are very chemically reactive as a result of the presence of unpaired electrons
  5. 12. The segmenting of a chromosome due to the breaking of one or both of the sugar-phosphate chains of a DNA ladder-like structure, which is a potential outcome when ionizing radiation interacts with a DNA macromolecule
  6. 14. The radiosensitivity of cells is directly proportional to their reproductive activity and inversely proportional to their degree of differentiation
  7. 15. Concept of radiation damage resulting from discrete and random events
Down
  1. 1. The mean quantity of energy deposited by ionizing radiation in an object per unit length of track as it passes through the object
  2. 2. The dissociation of molecules by ionizing radiation
  3. 3. A graphical method of displaying the sensitivity of a particular type of cell to lethal effects of radiation
  4. 4. Biologic damage that occurs as a non-secondary process of ionization of atoms on essential molecules, which may cause these molecules to become either inactive or functionally altered
  5. 5. A dimensionless factor that was chosen for radiation protection purpose to account for differences in biologic impact among various types of ionizing radiations
  6. 7. The ratio of the radiation dose required to cause a particular biologic response of cells or organisms in any oxygen deprived environment to the radiation dose required to cause an identical response under normally oxygenated conditions
  7. 8. Altered locations in macromolecules caused by the breaking of a single chemical bond
  8. 11. Changes in genes caused by the loss or change of a nitrogenous base on the DNA chain
  9. 13. The damaging effect, on key molecules, produced by free radicals that are created by the interaction of radiation with water molecules; cell death can result