Hereditary effects and cancer incidence are examples of which type of radiation effects?

• A. Stochastic Effects
• B. Nonstochastic Effects
• C. Deterministic Effects
• D. Latent Effects

Answer: (D)

The concept being tested is how radiation effects are categorized by probability and dose response. Hereditary effects and cancer incidence are stochastic effects. Stochastic effects are random in nature: the likelihood of their occurrence increases with dose, but there is no defined threshold below which they cannot occur. The severity of these outcomes isn’t determined by the dose in the same way as deterministic effects; instead, higher doses raise the probability that cancer or genetic changes will appear. Latent effects describe a time delay between exposure and when the effect becomes evident, which is a timing aspect rather than the probabilistic nature of the outcome. Deterministic (nonstochastic) effects, by contrast, have a threshold and their severity grows with dose, such as skin erythema or cataracts.