Each of the following statements is true EXCEPT one. Which one is the EXCEPTION?
a. During exposure, the x-rays strike and ionize all silver halide crystals on the film.
b. The invisible image on an x-ray film is called the "latent image."
c. The function of the gelatin in film emulsion is to keep the silver halide crystals evenly suspended over the base.
d. Silver halide in the emulsion is primarily silver bromide.
a. Some, but not all, of the silver halide crystals are ionized. Metal restorations absorb x-ray energy and prevent the radiation from reaching the film. Denser tissues such as enamel and bone absorb x-ray energy and prevent much more of it from reaching the film than less dense structures such as dentin or pulp.
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When caring for a 34-year-old male with a history of post-traumatic stress disorder (PTSD), which of the following instructions to your crew would be most appropriate?
A) "We must remove family members from around him." B) "We need to determine if he feels suicidal or homicidal." C) "We need to determine if he has ever killed anyone." D) "We need to determine if he remembers the event that caused the PTSD."
____ is a colorless gas with a pungent smell that is recognized by most as a cleaning product for drains and as an oven cleaner at concentrations as low as three parts per million (ppm).
A. Calcium oxide B. Anhydrous ammonia C. Silica D. Hydrofluoric acid
Guidance for deciding when, what type, and how many radiographs to expose on a patient have been developed and should be followed
Indicate whether the statement is true or false
How many fires are reported in the workplace in the United States on an average day?
A) 50 B) 100 C) 200 D) 500