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Blood urea nitrogen: Quiz

  

Question 1: [[File:Blood values sorted by mass and molar concentration.png|thumb|center|700px|________, comparing urea (yellow at right) to other blood constituents.
Arterial blood gasReference ranges for blood testsLiver function testsBlood plasma

Question 2: Impaired renal excretion of urea may be due to temporary conditions such as ________ or shock, or may be due to either acute or chronic disease of the kidneys themselves.
HyponatremiaHypernatremiaDiabetic ketoacidosisDehydration

Question 3: A low BUN usually has little significance, but its causes include liver problems, ________ (insufficient dietary protein), or excessive alcohol consumption.
MalnutritionVitaminICD-10 Chapter IV: Endocrine, nutritional and metabolic diseasesObesity

Question 4: The nitrogenous compounds from the blood are resorbed as they pass through the rest of the GI tract and then broken down to urea by the ________.
LiverEndocrine systemPancreasImmune system

Question 5: The most common cause of an elevated BUN, azotemia, is poor kidney function, although a serum creatinine level is a somewhat more specific measure of renal function (see also ________).
NephronAnion gapRenal physiologyRenal function

Question 6: ________ is a substance secreted by the liver, and removed from the blood by the kidneys.
UreaAmmoniaNitrogenCysteine

Question 7: Normal changes in renal bloodflow during ________ will also lower BUN.
Reproductive medicinePrenatal developmentSexual intercoursePregnancy

Question 8: The liver produces urea in the urea cycle as a waste product of the ________ of protein.
StomachDigestionEndocrine systemImmune system

Question 9: This was demonstrated by Johnson et al. by adding large amounts of urea to the dialysate of ________ patients for several months and finding no ill effects.
HemofiltrationICD-9-CM Volume 3HemodialysisSurgery

Question 10: Enhanced metabolism of proteins will also increase urea production, as may be seen with high protein diets, ________ use, burns, or fevers.
SteroidTestosteroneCholesterolLipid metabolism
















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