All of the following are systemic conditions that can cause an increased predisposition to periodontal diseases except one. Which one is the exception?

A) Diabetes mellitus
B) Vitamin A deficiency
C) AIDS
D) Neutropenia
E) Stress

B

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The function of the vaporizer of a liquid bulk oxygen system is to:

a. act as a pressure release. b. reduce the pressure to 50 psig. c. convert liquid oxygen to gaseous oxygen. d. allow heat to be released into the envi-ronment.

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The time required for development of radiographic film is determined by the:

a. temperature of the darkroom. b. temperature of the water. c. temperature of the developer. d. temperature of the fixer.

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