Which of the following is true of a radiopaque substance?
a. Absorbs most of the x-rays it is exposed to
b. Lung tissue is an example
c. Is an air-containing structure
d. Permits the passage of most x-rays
A
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Which of these exercise prescriptions best describes an intermediate level aerobic activity program for an adult?
A. Walk 3 days per week 15 minutes per session at 40% of VO2 max. B. Cycle 5 days per week, 30 minutes per session at 40% of VO2 max. C. Walk 5 days per week, 60 minutes per session at 60% of VO2 max. D. Cycle 6 days per week, 75 minutes per session at 75% of VO2 max.
Which of the following terms means a refusal to admit or acknowledge the reality of something, thus avoiding emotional conflict or anxiety??
A) denial B) compensation C) rationalization D) dementia
The device used to measure the radiation exposure of an individual is a
A) dose calibrator B) Geiger-Mueller counter C) dosimeter D) respirator