The etiology of hairy tongue is associated with:
a. Systemic antibiotic therapy
b. Oral hydrogen peroxide abuse
c. Therapeutic irradiation to the head and neck
d. All the above
e. None of the above
D
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Any area that has been treated with talcum powder or skin lotion must be rubbed with ________ to remove the residue to facilitate the adherence of the leads
a. soap only b. alcohol c. water only d. Vaseline
Why does ventilation–-perfusion mismatching affect the PaO2 more than the PaCO2? I. CO2 is highly diffusible across the alveolar-capillary membrane. II. The PaCO2 is essentially linear to the CO2 content of the blood. III. The O2 is less than the CO2. IV. The relationship between the PaO2 and the O2 content in the blood is nonlinear
A. III only B. I, II only C. I, II, IV only D. II, III, IV only
The millisievert (mSv) is equal to
a. 1/10 of a sievert. b. 1/100 of a sievert. c. 1/1000 of a sievert. d. 1/10,000 of a sievert.
Which of the following prefixes means "blue"?
chlor- cyan- xanth- melan-