Which control serves to protect a patient from overexposure and protect the tube from damage?
mAs timer
mA station
backup timer
density setting
backup timer
Rationale: The backup timer is crucial to ensure that a patient is protected from overexposure and to protect the x-ray tube in result of AEC failure.
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The EMT understands that capnometry informs the care provider of:
A) Level of oxygen in the lungs. B) Amount of CO2 being exhaled. C) Measure of O2 being delivered to the cells. D) The adequacy of oxygen diffusion into the bloodstream.
The neurotransmitter norepinephrine is terminated by the enzymes __________ and __________
a. catechol O-methyltransferase (COMT) and monoamine oxidase (MAO) b. catechol O-methyltransferase (COMT) and cholinesterase c. cholinesterase and monoamine oxidase (MAO) d. monoamine oxidase (MAO) and pseudocholinesterase