Which tissues are commonly considered radioresistant?

Study for the Dental Radiology Foundation Chain and Physics Test. Enhance your skills with flashcards and multiple-choice questions, complete with hints and explanations. Prepare for your success!

Multiple Choice

Which tissues are commonly considered radioresistant?

Radiosensitivity depends on how quickly cells divide and how well they can repair damage. Tissues with low cell turnover and good repair capacity tend to be radioresistant. Salivary glands, kidney, and liver fit this pattern because their parenchymal cells divide slowly under normal conditions and can recover well after radiation exposure. In contrast, tissues that renew rapidly, like lymphoid tissue and bone marrow, are much more radioresponsive, which is why they’re not considered radioresistant. The brain and spinal cord and skeletal muscle are also commonly viewed as relatively resistant, so the three listed organs align with the idea of being radioresistant in many radiobiology discussions.

Radiosensitivity depends on how quickly cells divide and how well they can repair damage. Tissues with low cell turnover and good repair capacity tend to be radioresistant. Salivary glands, kidney, and liver fit this pattern because their parenchymal cells divide slowly under normal conditions and can recover well after radiation exposure. In contrast, tissues that renew rapidly, like lymphoid tissue and bone marrow, are much more radioresponsive, which is why they’re not considered radioresistant. The brain and spinal cord and skeletal muscle are also commonly viewed as relatively resistant, so the three listed organs align with the idea of being radioresistant in many radiobiology discussions.

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