agonists a group of psychoactive drugs that cause neurotransmitters to be released, prevent deactivation of neurotransmitters, or mimic the effects of neurotransmitters by binding to their receptors, drugs such as nicotine and cocaine are examples
when changing from a beam indicating device (BID) of 6" with an exposure time of 0.5 seconds to a BID of 12", the new exposure time would be how many secondsa. 1b. 1.5c. 2d. 2.5e. 4.0
which of the following structure is radiolucenta. genial tuberclesb. external oblique ridgec. hamular processd. nasal septume. submandibular fossa
Dental x-rays area. electromagnetic radiationsb. particulate radiationsc. subatonic radiationsd. ultrasonic radiationse. microwave radiations
the largest source of ionizing radiation exposure to a population isa. consumer productsb. medical and dental examinationsc. atmospheric weapons testsd. nuclear energy productione. naturally occurring radionuclides
Which of the following would increase the number of electrons flowing through the dental x-ray electrical circuita. an increase in the milliamperageb. an increase the kilovoltagec. an increase in the PID length
A setting of 85 kVp is equal to how many volts?a. 850b. 8500c. 85,000d. 850,000e. 8,500,000
True / False. True / Falsevoltage is the measurement of the number of electrons flowing in an electrical circuit. Decreasing the voltage decreases the force that moves the electrons along an electrical conductor.
True / False. True / FalseThe cathode is the electrically negative portion of the vacuum tube, and it is composed of a focusing cup and filament.
the kVp control regulates all of the following EXCEPT which one?a. accelerating potentialb. attraction between anode and cathodec. penetrating power of the x-ray beamd. heating of the filament
which of the following PID lengths BEST decreases radiation exposure to the patient and improves image resolution?a. 8 inchesb. 4 inchesc. 12 inchesd. 16 inches
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