12 Questions
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)
Which factor influences radiosensitivity by affecting the ability to repair damage, hypoxia, cell cycle position, and growth fraction?
Linear Energy Transfer (LET)
What type of radiation is associated with greater damage in a biologic system due to higher Linear Energy Transfer (LET)?
Alpha particles
What is the ratio of the biological effectiveness of one type of ionizing radiation relative to another called?
Relative Biological Effectiveness (RBE)
Why do many tumors initially respond to therapy but are ultimately incurable?
Mixed Cell Populations
What physical factor increases and maximizes relative biological effectiveness (RBE) around 100 KeV/μm?
Alpha particles
Which of the following best describes radiosensitivity?
The vulnerability of cells, tissues, organs, or organisms to the harmful effects of ionizing radiation
What is the latent period in radiation biology?
The time between exposure and the first signs of radiation damage
According to the law of Bergonie and Tribondeau, which cells are most sensitive to ionizing radiation?
Epidermal stem cells
Which type of cells are considered least sensitive to ionizing radiation?
Muscle fibers
According to the law of Bergonie and Tribondeau, which tumors are highly susceptible to radiation?
Tumors composed of rapidly multiplying embryonal cells
In which phase of the cell cycle are cells most sensitive to ionizing radiation?
M phase
Test your knowledge on radiosensitivity, radiation effects, latent period, and fundamental laws of radiation biology. Learn about the relative vulnerability of cells, tissues, organs, and organisms to ionizing radiation.
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