A cell or tissue that experiences biological harm from relatively low doses of radiation is described as having:

A cell or tissue that experiences biological harm from relatively low doses of radiation is described as having:

• A. High Radiosensitivity
• B. Low Radiosensitivity
• C. High Radiolucency
• D. Low Radiolucency

Answer: (A)

Radiosensitivity is about how likely a tissue is to suffer biological damage from ionizing radiation. A tissue that shows harm at relatively low doses is highly radiosensitive, because its cells are usually rapidly dividing and less specialized. These characteristics mean DNA damage from even small amounts of radiation can disrupt cell function or lead to cell death, which shows up as tissue injury. Classic examples are tissues with high turnover, like bone marrow or the lining of the intestines. The other ideas don’t describe this effect. Radiolucency relates to how a material appears on an X-ray image (how much radiation passes through), not how the tissue responds biologically to radiation, so it doesn’t indicate damage at low doses.

Radiosensitivity is about how likely a tissue is to suffer biological damage from ionizing radiation. A tissue that shows harm at relatively low doses is highly radiosensitive, because its cells are usually rapidly dividing and less specialized. These characteristics mean DNA damage from even small amounts of radiation can disrupt cell function or lead to cell death, which shows up as tissue injury. Classic examples are tissues with high turnover, like bone marrow or the lining of the intestines.

The other ideas don’t describe this effect. Radiolucency relates to how a material appears on an X-ray image (how much radiation passes through), not how the tissue responds biologically to radiation, so it doesn’t indicate damage at low doses.