Radiation Health & SafetyQuestion 29 of 100
Which statement about the dose-response relationship used in radiation protection is correct?
a.There is a large safe threshold below which no biological effect is possible
b.Only doses above 10 rem produce any cellular change
c.Effects occur only when exposure happens in a single session
d.A linear, non-threshold model is assumed, meaning any dose carries some potential risk
Explanation
Radiation protection is built on a linear, non-threshold assumption: risk is proportional to dose and no dose is assumed to be completely without risk, which is the foundation of ALARA. There is no established safe threshold, and cellular change is not limited to doses above 10 rem. Effects also accumulate from repeated small exposures, not only from a single large session.
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