<prompt> A deterministic effectHas a threshold in dose but the severity of the effect is otherwise dose-independentHas a threshold in dose and the severity of the effect increases with doseHas no threshold in dose and the severity of the effect is a constant function of doseHas no threshold in dose and the severity of the effect increases with dose  <response>: Deterministic effect: severity increases with dose; practical threshold; the probability of occurrence increases with dose; e.g., cataract.Stochastic effect: severity independent of dose; probability of occurrence increases with dose; no threshold; e.g., cancerReference: Eric J Hall Textbook of Radiobiology for Radiologist; 5th edition 