A cell or tissue that experiences biological harm only at very high doses is described as having:

A cell or tissue that experiences biological harm only at very high doses is described as having:

• A. high radiosensitivity
• B. high radiolucency
• C. low radiotoxicity
• D. low radiosensitivity

Answer: (C)

The question hinges on how radiation affects tissue, which depends on two related ideas: radiosensitivity and radiotoxicity. If a cell or tissue only sustains biological harm at very high doses, it shows a high tolerance to radiation. This is described as having low radiotoxicity—the radiation is relatively non-toxic to that tissue, so harmful effects only emerge when the dose is very large. High radiosensitivity would mean damage occurs at low doses, which isn’t the case here. Radiolucency is an imaging term and doesn’t describe biological harm, while low radiosensitivity would also imply resistance but is described here using radiotoxicity terminology, making low radiotoxicity the best fit for the statement.

The question hinges on how radiation affects tissue, which depends on two related ideas: radiosensitivity and radiotoxicity. If a cell or tissue only sustains biological harm at very high doses, it shows a high tolerance to radiation. This is described as having low radiotoxicity—the radiation is relatively non-toxic to that tissue, so harmful effects only emerge when the dose is very large. High radiosensitivity would mean damage occurs at low doses, which isn’t the case here. Radiolucency is an imaging term and doesn’t describe biological harm, while low radiosensitivity would also imply resistance but is described here using radiotoxicity terminology, making low radiotoxicity the best fit for the statement.