On a radiograph, an amalgam tattoo may appear as a(n):

a. radiolucency.
b. radiopacity.
c. bluish-colored irregularity.
d. overhang.

b. Amalgam that fractures during an extraction and falls into the root socket or under the gingival tissue may impart a bluish-purple color to the tissue, called an "amalgam tattoo." Because the amalgam is dense, it will appear radiopaque on the radiograph.

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A passive process whereby compounds move from an area of higher concentration to an area of lower concentration is called:

a. diffusion. b. osmosis. c. metabolism. d. inhalation.

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Which laboratory test is considered to have a reliable negative predictive value in the diagnosis of DVT?

a. Factor VLeiden b. PT c. tPA d. D-dimer

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