Which of the following drugs was found to be teratogenic and was prevented by the FDA from reaching the market?
a. Cocaine
b. Thalidomide
c. Sulfanilamide
d. Tetracycline
ANSWER: b
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Which of the following gases would diffuse fastest across the alveolar-capillary membrane?
a. Air b. Carbon dioxide c. O2 d. Nitrogen
Which of the following would you expect to occur if ventilation to an area of the lung remained constant but perfusion to this same area decreased?
1. The PACO2 should fall. 2. The PAO2 should fall. 3. The ratio should rise. a. 3 only b. 1 and 2 only c. 1 and 3 only d. 1, 2, and 3
Patients who have impaired kidney function, but are not in end-stage disease, are termed to have ____.
A. benign hyperplasia B. chronic kidney disease C. peptic ulcer disease D. benign hypertrophy
The difference in densities between adjacent areas on the radiograph is termed
A) sharpness. B) density. C) resolution. D) contrast.