What percent of the kinetic energy inside the x-ray tube is actually converted to x-radiation?
A) 99 percent
B) 50 percent
C) 25 percent
D) 1 percent
D
Explanation: A) The kinetic energy (the high-velocity electrons) is converted into approximately 1 percent x-ray energy. The other 99 percent of the kinetic energy generated is lost as heat.
B) The kinetic energy (the high-velocity electrons) is converted into approximately 1 percent x-ray energy. The other 99 percent of the kinetic energy generated is lost as heat.
C) The kinetic energy (the high-velocity electrons) is converted into approximately 1 percent x-ray energy. The other 99 percent of the kinetic energy generated is lost as heat.
D) The kinetic energy (the high-velocity electrons) is converted into approximately 1 percent x-ray energy. The other 99 percent of the kinetic energy generated is lost as heat.
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The dorsal roots of the spinal cord contain afferent fibers that transmit impulses from ________ to ________
A) the central nervous system, motor nerves B) sensory nerves, central nervous system C) the central nervous system, sensory nerves D) motor nerves, the central nervous system
In plans that require the primary care physician (PCP) to play a gatekeeper role, the PCP is given incentives to:
A. expand office hours and/or staff to permit more patients to be seen each day. B. make frequent referrals to contracted network specialists. C. see as many patients each day as possible, even if this means less time with each patient. D. treat the patient as much as possible and not refer him/her to a specialist unless absolutely necessary.