WorksheetsRad Bio Chapter 9 Vocabulary Quiz
Total questions: 18
Worksheet time: 9mins
Which statement best defines absolute risk in radiation epidemiology?
Model predicting proportional increase relative to background
Measure of late effects severity regardless of dose
Model estimating specific excess cancers for given dose
Statistic describing random variation in small samples
Carcinogenesis is best described as:
Formation of lens opacity after high-dose exposure
Transformation of normal cells into malignant cells
Process of organ formation during gestation weeks
Random hereditary changes without dose dependence
Cataractogenesis refers to the:
Formation of lens opacity with threshold behavior
Random mutations transmitted through germ cells
Linear increase in leukemia incidence with dose
Development of organs during early pregnancy
The term doubling dose denotes the dose that:
Produces twice the number of deterministic effects
Doubles the severity of late tissue reactions
Doubles the spontaneous mutation rate in a generation
Halves the natural background cancer incidence
Embryologic effects (birth defects) depend primarily on:
Total lifetime dose accumulated in adulthood
Developmental stage and dose during embryo-fetal period
Only parental exposures prior to conception
Type of dosimeter and measurement conditions
Epidemiology in radiation health science is the:
Legal framework for occupational dose limits
Analysis of individual patient imaging protocols
Physics of energy deposition at cellular scale
Study of disease patterns to derive risk estimates
Genetic, or hereditary, effects are:
Effects in future generations from germ cell DNA damage
Somatic tissue reactions limited to the exposed person
Immediate inflammatory responses after high doses
Protective adaptations that lower mutation rates
Late somatic effects are those that:
Appear months or years after exposure in the person
Occur immediately after irradiation of any tissue
Are confined to the embryo during organogenesis
Only result from background environmental radiation
Late tissue reactions are characterized by:
Threshold behavior where severity depends on dose
Exclusive association with hereditary effects only
Nonthreshold behavior with risk proportional to dose
Random occurrence independent of total dose received
A linear nonthreshold curve implies that:
Severity increases but probability remains constant
Any dose carries risk proportional to dose amount
Risk increases rapidly then plateaus at high dose
Only doses above a certain level cause an effect
The linear-quadratic nonthreshold model includes:
Purely stochastic processes without dose relation
A plateau at low doses with zero incremental risk
Only a threshold S-shaped relationship for tissues
Both linear and quadratic dose-response components
Nonthreshold relationship means:
Any radiation dose can produce an effect
Only therapeutic doses cause measurable risk
Below a certain dose no effect will occur
Severity of effect is dose independent
Organogenesis refers to the period when:
Lens opacities develop after high therapeutic doses
Germ cells mature during late fetal and neonatal life
Somatic mutations accumulate during adulthood
Organs form between about 10 days and 12 weeks postconception
Radiation dose-response relationship describes the:
Shielding thickness required for given beam quality
Calibration between detector signal and exposure rate
Time course of radionuclide physical decay only
Association between dose and observed biologic effect
Relative risk model predicts:
Percent increase in cancer incidence relative to background
Specific number of excess cancers per given dose
Zero risk at low doses due to homeostasis
Only hereditary disease risk in future generations
Stochastic effects are best characterized by:
Protective cellular responses reducing risk at high dose
Immediate deterministic effects after any exposure
Threshold tissue reactions where severity increases
Random, nonthreshold effects with dose-dependent probability
Threshold is defined as the dose level:
That doubles the spontaneous mutation frequency
Where all effects become hereditary in offspring
At which risk becomes exactly proportional to dose
Below which no biologic effect is observed
Which of the following are typically modeled with nonthreshold relationships?
Cancer induction in exposed populations
Hereditary effects from germ cell mutations
Tissue fibrosis after high therapeutic doses
Cataract formation in the ocular lens
