When free radicals previously produced by the interaction of radiation with water molecules act on a molecule such as DNA, the damaging action of ionizing radiation is indirect in the sense that the radiation is not the immediate cause of injury to the macromolecule. What is the immediate cause of this damage?
a. Excitation of the atoms of the biologic macromolecules
b. Enzymes released from biologic macromolecules
c. The recombining of a positively charged water molecule with an electron
d. The free radicals produced by the interaction of radiation with water molecules
d. The free radicals produced by the interaction of radiation with water molecules
Health Professions
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A. Nozzle reaction B. Head pressure C. Static pressure D. Atmospheric pressure
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Peripheral vessel angioplasty stents may be made of all of the following EXCEPT:
a. titanium b. fascia lata c. polypropylene d. stainless steel mesh
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