Which of the following best describes how x-rays are actually produced in the dental x-ray tube?
a. Radioactive particulate matter undergoes controlled disintegration.
b. Electrical current passes through an oil mixture, creating minute explosions.
c. Low milliamperage current is transformed to high kilovoltage current.
d. High-speed electrons collide with target material electrons.
d. When the high-velocity electrons are stopped or slowed as they collide with the tungsten atoms in the target, the result is the production of general radiation (bremsstrahlung) and/or characteristic radiation.
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While assessing the mental status of an elderly patient who has been retired for several years, you notice he has difficulty answering your questions. He seems depressed. Based on this information, you should:
A) acknowledge the patient's fears and try to put them in perspective. B) consider the need for advanced provider care. C) consider his mental status as being decreased. D) suspect a life-threatening neurological event.
The chest pain associated with cardiac compromise often is described as
A. sharp B. stabbing C. pressure D. cramping