Radiosensitivity and Radiation Effects Quiz
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Radiosensitivity and Radiation Effects Quiz

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@ThrilledTelescope

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Questions and Answers

What is the average amount of energy deposited per unit track length in tissue by a specific type of radiation called?

  • Linear Energy Transfer (LET) (correct)
  • Radiosensitivity
  • Gamma rays
  • Relative Biological Effectiveness (RBE)

    • Which factor influences radiosensitivity by affecting the ability to repair damage, hypoxia, cell cycle position, and growth fraction?

  • Volume of the initial tumor
  • Linear Energy Transfer (LET) (correct)
  • Relative Biological Effectiveness (RBE)
  • Grade of malignancy

    • What type of radiation is associated with greater damage in a biologic system due to higher Linear Energy Transfer (LET)?

  • X-rays
  • Alpha particles (correct)
  • Electrons
  • Gamma rays

    • What is the ratio of the biological effectiveness of one type of ionizing radiation relative to another called?

    <p>Relative Biological Effectiveness (RBE)</p> Signup and view all the answers

    Why do many tumors initially respond to therapy but are ultimately incurable?

    <p>Mixed Cell Populations</p> Signup and view all the answers

    What physical factor increases and maximizes relative biological effectiveness (RBE) around 100 KeV/μm?

    <p>Alpha particles</p> Signup and view all the answers

    Which of the following best describes radiosensitivity?

    <p>The vulnerability of cells, tissues, organs, or organisms to the harmful effects of ionizing radiation</p> Signup and view all the answers

    What is the latent period in radiation biology?

    <p>The time between exposure and the first signs of radiation damage</p> Signup and view all the answers

    According to the law of Bergonie and Tribondeau, which cells are most sensitive to ionizing radiation?

    <p>Epidermal stem cells</p> Signup and view all the answers

    Which type of cells are considered least sensitive to ionizing radiation?

    <p>Muscle fibers</p> Signup and view all the answers

    According to the law of Bergonie and Tribondeau, which tumors are highly susceptible to radiation?

    <p>Tumors composed of rapidly multiplying embryonal cells</p> Signup and view all the answers

    In which phase of the cell cycle are cells most sensitive to ionizing radiation?

    <p>M phase</p> Signup and view all the answers

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