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Twenty Questions

Learn about radiation protection through 20 informative questions covering units of measure, effects on cells, natural sources, exposure limits, and more.

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Twenty Questions

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  1. Twenty Questions Radiation Protection

  2. Radiation Protection Questions

  3. 1. The traditional unit of measure for the equivalent dose (EqD) is the _________. • Sievert (Rem)

  4. 2. This consists of two protons and two neutrons. • Alpha Particle.

  5. 3. The millisievert (mSv) is a subunit of the Sievert. One Sievert equals _______ millisieverts. • 1000

  6. 4. The radiation interaction with tissue that involves ejecting a K-shell electron is called? • Photoelectric effect

  7. 5. The most common type of naturally occurring radiation is: • Radon – Radon makes up about 55% of all natural and manmade radiation exposures in the U.S.

  8. 6. Naturally occurring background radiation that comes from the sun and stars is called________. • Cosmic Radiation

  9. 7. Referring to the chart, is there more natural or man-made radiation exposure for the average U. S. citizen? • Natural.

  10. 8. What phase of cellular division belongs where letter A is on the diagram? • Metaphase

  11. 9. What is the annual occupational effective dose for radiographers during routine operations? • 50 mSv or 5 rem

  12. 10. When exposed to radiation as a part of their educational experience, students under the age of 18 years old, should not exceed an effective dose limit of _______ annually. • 1 mSv or .1 rem

  13. 11. Determine the cumulative effective dose (CumEfD) to the whole body of an occupationally exposed person who is 27 years old. • 270 mSv or 27 Rem • 10 mSv X Age or 1 Rem x Age

  14. Cancer & Genetic defects are examples of ______ effects.A. StochasticB. NonstochasticC. BirthD. Deterministic • Stochastic effects are mutational, non-threshold, randomly occurring effects. • Non-stochastic or deterministic effects can be directly linked to a radiation event.

  15. 13. Which of the following curves represents a non-linear threshold response. • Curve 3.

  16. 14. Which of the following curves represents the standard on which radiation dose limits are set? • Curve 1 Linear- non threshold

  17. 15. The lethal dose of ionizing radiation for humans is stated as: • The LD 50/30 is 300 – 400 Rads Sometimes this is expressed as the LD 50/60 • Under 100 rad, no death is expected. • Without medical support, death to the entire population occurs at about 600 Rad.

  18. 16. What do basal cells of the skin, intestinal crypt cells and reproductive cells have in common? • All cells are radiosensitive • Lymphocytes, spermatogonia, erythroblasts, DNA molecules & intestinal crypt cells are highly radiosensitive • Muscle & nerve cells have low radiosensitivity

  19. Which of the following are classified as high LET Radiations?Alpha particlesGamma RaysX-rays • Alpha particles only

  20. 18. Which molecules of the human body are most commonly acted on by ionizing radiation to produce molecular damage through and indirect action? • Water Molecules

  21. 19. The law of Bergonie and Tribondeau takes into account that the most pronounced radiation effects occur in cells having the _(most/least) reproductive activity, (longest/shortest) mitotic phases and (most/least) maturity. • Most Reproductive, longest mitotic phase, least maturity

  22. 20. Somatic cells divide through the process of: • Mitosis - Somatic cells are all general cells in the body • Meiosis is the division of the genetic or germ cells

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