Oral Radiology Lecture 9: Radiation Biology and Hazard
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Oral Radiology Lecture 9: Radiation Biology and Hazard

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Questions and Answers

Which type of radiation has sufficient energy to dislodge orbital electrons?

  • Microwaves
  • Ultraviolet light
  • Infrared light
  • Alpha particles (correct)

    • What is the basic effect of radiation on living subjects?

  • Absorption of X-Ray photons
  • Displacement of orbital electrons
  • Formation of new chemicals (correct)
  • Stability of atoms in the human body

    • Which type of radiation does not have sufficient energy to dislodge orbital electrons?

  • Neutrons
  • Beta particles
  • Gamma rays
  • Radio waves (correct)

    • What is the study of the effects of ionizing radiation on living systems called?

    <p>Radiation biology</p> Signup and view all the answers

    What happens when an X-Ray photon strikes a negative electron in the atom of living subjects?

    <p>The electron is displaced, leading to ionization</p> Signup and view all the answers

    What is the term for the initial interaction between ionizing radiation and matter at the level of the electron within the first 10-13 seconds after exposure?

    <p>Direct effect</p> Signup and view all the answers

    Which mechanism of ionizing radiation is responsible for direct damage to specific targets within the cell?

    <p>Direct effect</p> Signup and view all the answers

    When X-Ray photons are absorbed within the cell and cause the formation of toxins, which type of effect is this termed?

    <p>Indirect effect</p> Signup and view all the answers

    What is the term for the probability of an effect increasing with the dose, but the severity of the effect being independent of the dose received?

    <p>Stochastic effect</p> Signup and view all the answers

    Which type of effect refers to cell killing caused by very high doses of radiation?

    <p>Deterministic effect</p> Signup and view all the answers

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