Quiz 3 Chapter 4 Flashcards
End of chapter objectives
The latent period in radiation biology is the time between
A. Initial Injury and Repair
A free radical:
e. all of above
Direct radiation injury occurs when
a. x-ray photons hit critical targets within a cell
Indirect radiation injury occurs when:
c. x-ray photons are absorbed and form toxins
Which relationship describes the response of tissues to radiation?
c. linear, nonthreshold
Which factor(s) contributes to radiation injury?
e. all of the above
Which statement is correct?
a. Short-term effects are seen with small amounts of radiation absorbed in a short period.
b. Short-term effects are seen with small amounts of radiation absorbed in a long period.
c. Long-term effects are seen with small amounts of radiation absorbed in a short period.
d. Long-term effects are seen with small amounts of radiation absorbed in a long period.
e. None of the above.
d.
Radiation injuries that are not seen in the person irradiated but that occur in future generations are termed:
b. genetic effects
Which is most susceptible to ionizing radiation?
e. epithelial tissue
The sensitivity of tissues to radiation is determined by:
c. cell differentiaion
Which is considered radioresistant
mature bone cells
An organ that, if damaged, diminshes the quality of an individuals life is termed:
a. critical
The traditional unit for measuring xray exposure in air is termed
e. roentgen
**Which radiation unit is determined by the quality factor? (QF)
REM
The unit for measuring the absorption of x-rays is termed
RAD
What is the greatest contributer to artificial radiaiton exposure
medical radiation
The amount of radiation exposure an individual receives varies depending on:
Receptor type
Collimation
Technique
A single intraoral image using a digital sensor results in an effective exposure dose of
2.00 mSv
What is the approximate average dose of background radiation received by an individual in the united states
300 mrem/3.0 mSv
what is the greatest contributer to artificial radiation exposure
medical radiation
What is the dose at which leukemia induction is most likely to occur?
d. 5000 mrad (.05Gy)
Which statement is incorrect?
a. X-radiation is not harmful to living tissues. b. Dental images benefit the patient.
c. In dental imaging, the benefit of disease detection outweighs the risk of damage from radiation.
d. Dental images should be prescribed only when the benefit outweighs the risk.
e. Biologic damage results from x-ray exposure.
a.
