How does an ultrasound produce images of a fetus?
a. It uses x-rays, which are absorbed by fetal tissue, thus creating an image.
b. It uses sounds waves, which are absorbed by the fetal tissue, thus creating an image.
c. It uses x-rays, which either pass through or bounce off fetal tissue, thus creating an image.
d. It uses sound waves, which either pass through or bounce off fetal tissue, thus creating an image.
ANS: D
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