On an x-ray, an area of low density is said to be ________
A) radiolucent
B) radiopaque
C) translucent
D) transopaque
A
Explanation: A) Correct! Air (in a body cavity or the lungs) has a low density, and x-rays pass through it, creating a nearly black area on the x-ray plate.
B) An area of low density is not radiopaque.
C) An area of low density is not said to be translucent.
D) There is no such word as transopaque.
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