Radiology Chapter 4: Radiation Biology
2024/2025 Exam Questions and Answers
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Radiation biology - 🧠ANSWER ✔✔The study of the effects of ionizing
radiation.
Ionization - 🧠ANSWER ✔✔The production of ions; the process of
converting an atom into an ion, resulting in the formation of a positive atom
and a dislodged negative electron.
Free radical - 🧠ANSWER ✔✔An uncharged, neutral atom or molecule the
exists with a. single, unpaired electron in its outermost shell.
Direct theory - 🧠ANSWER ✔✔A theory that suggests that cell damage
results when ionizing radiation hits critical areas.
Indirect theory - 🧠ANSWER ✔✔A theory suggesting that cell damage
results indirectly; x-ray photons are absorbed with the cell, causing the
formation of toxins; toxins, in turn damage the cell.
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, Dose-response curve - 🧠ANSWER ✔✔A crude that can be used to
correlate the "response," or damage, of tissues with the "dose," or amount,
of radiation received.
Stochastic effects - 🧠ANSWER ✔✔Biologic effects from radiation that
occur as a direct function of dose; the probability of occurrence increases
with increasing absorbed dose; however, the severity of effects does not
depend on the magnitude of the absorbed dose.
Non-stochastic effects - 🧠ANSWER ✔✔Effects of radiation that have a
threshold and increase in severity with increasing absorbed dose.
Latent period - 🧠ANSWER ✔✔The amount of time that elapses between
exposure to ionizing radiation and the appearance of observable clinical
signs.
Period of injury - 🧠ANSWER ✔✔Occurs after the latent period following
exposure to radiation; can include a variety of cellular injuries.
Recovery period - 🧠ANSWER ✔✔The period during which cellular damage
caused by radiation is followed by repair.
Cumulative effects - 🧠ANSWER ✔✔The additive effects of repeated
radiation exposure.
COPYRIGHT©PROFFKERRYMARTIN 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE.
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PRIVACY STATEMENT. ALL RIGHTS RESERVED
2024/2025 Exam Questions and Answers
| 100% Solved
Radiation biology - 🧠ANSWER ✔✔The study of the effects of ionizing
radiation.
Ionization - 🧠ANSWER ✔✔The production of ions; the process of
converting an atom into an ion, resulting in the formation of a positive atom
and a dislodged negative electron.
Free radical - 🧠ANSWER ✔✔An uncharged, neutral atom or molecule the
exists with a. single, unpaired electron in its outermost shell.
Direct theory - 🧠ANSWER ✔✔A theory that suggests that cell damage
results when ionizing radiation hits critical areas.
Indirect theory - 🧠ANSWER ✔✔A theory suggesting that cell damage
results indirectly; x-ray photons are absorbed with the cell, causing the
formation of toxins; toxins, in turn damage the cell.
COPYRIGHT©PROFFKERRYMARTIN 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE.
1
PRIVACY STATEMENT. ALL RIGHTS RESERVED
, Dose-response curve - 🧠ANSWER ✔✔A crude that can be used to
correlate the "response," or damage, of tissues with the "dose," or amount,
of radiation received.
Stochastic effects - 🧠ANSWER ✔✔Biologic effects from radiation that
occur as a direct function of dose; the probability of occurrence increases
with increasing absorbed dose; however, the severity of effects does not
depend on the magnitude of the absorbed dose.
Non-stochastic effects - 🧠ANSWER ✔✔Effects of radiation that have a
threshold and increase in severity with increasing absorbed dose.
Latent period - 🧠ANSWER ✔✔The amount of time that elapses between
exposure to ionizing radiation and the appearance of observable clinical
signs.
Period of injury - 🧠ANSWER ✔✔Occurs after the latent period following
exposure to radiation; can include a variety of cellular injuries.
Recovery period - 🧠ANSWER ✔✔The period during which cellular damage
caused by radiation is followed by repair.
Cumulative effects - 🧠ANSWER ✔✔The additive effects of repeated
radiation exposure.
COPYRIGHT©PROFFKERRYMARTIN 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE.
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PRIVACY STATEMENT. ALL RIGHTS RESERVED
