Question 1

What is defined as the time that elapses between exposure to ionizing radiation and the appearance
Of observable clinical signs?

A) Direct theory
B) Response curve
C) Indirect theory
D) Latent period

Latent period

Accepted Answer

A latent period can be defined as the time that elapses between exposure to ionizing radiation and the appearance of observable clinical signs.

Question 2

The deleterious effects of ionizing radiation on human tissue can be divided into what types?&#10;A) Absorbed and nonabsorbed&#10;B) Ionizing and nonionizing&#10;C) Direct and indirect&#10;D) Stochastic and nonstochastic

Accepted Answer

The deleterious effects of ionizing radiation on human tissue can be divided into two types: stochastic and nonstochastic.

Question 3

What is the main advantage of using a rectangular collimator over a circular one?&#10;A) To make it easier to line up with the film&#10;B) To increase the size of the x-ray beam&#10;C) To reduce patient exposure&#10;D) For easier storage against the wall

Accepted Answer

Radiation exposure can be limited by using rectangular collimation. The use of rectangular collimation
instead of round collimation reduces the absorbed dose by 60% to 70%.

Question 4

What results from ionization or free radical formation?&#10;A) Radiation injury&#10;B) Radiation exposure&#10;C) Radiation collimation&#10;D) Radiation toxicity

Accepted Answer

Radiation injury results from ionization or free radical formation.

Question 5

Radiation injury follows a sequence of events. What is the sequence of those events?&#10;A) Period of recovery, period of injury, and latent period&#10;B) Latent period, period of injury, and period of recovery&#10;C) Period of injury, latent period, and period of recovery&#10;D) Latent period, period of radiation, and period of recovery

Accepted Answer

Radiation injury follows a sequence of events: latent period, period of injury, and period of recovery.

Question 6

Radiation injury is affected by:&#10;A) half dose.&#10;B) patient's weight.&#10;C) amount of tissue irradiated.&#10;D) cell division.

Accepted Answer

Radiation injury is affected by total dose, dose rate, amount of tissue irradiated, cell sensitivity, and patient's age.

Question 7

What effects occur when large amounts of radiation are absorbed in a short period?&#10;A) Short-term radiation&#10;B) Radiation injury&#10;C) Long-term radiation&#10;D) X-radiation

Accepted Answer

Short-term radiation effects occur when large amounts of radiation are absorbed in a short period.

Question 8

What effects occur when small amounts of radiation are absorbed over a long time?&#10;A) Radiation injury&#10;B) Short-term radiation&#10;C) Long-term radiation&#10;D) X-radiation

Accepted Answer

Long-term radiation effects occur when small amounts of radiation are absorbed over a long time.
pp. 39-40

Question 9

What are seen in a person irradiated that produce poor health?&#10;A) Somatic effects&#10;B) Genetic effects&#10;C) Short-term effects&#10;D) Long-term effects

Accepted Answer

Radiation injuries that produce changes in somatic cells produce poor health in the irradiated individual. Major somatic effects of radiation exposure include the induction of cataracts and
cancer, including leukemia.

Question 10

What are not seen in a person irradiated but are passed on to future generations?&#10;A) Somatic effects&#10;B) Genetic effects&#10;C) Short-term effects&#10;D) Long-term effects

Accepted Answer

Genetic effects are not seen in the irradiated person but are passed on to future generations.

Deck 4: Radiation Biology