10 Questions
What is the primary function of the nephron in relation to non-protein nitrogenous substances?
Ultra-filtration at the glomerulus
Which condition is characterized by an excess of urea or other nitrogenous compounds in the blood?
Azotemia
Which hormone is important for the reabsorption of water from the kidneys?
Antidiuretic hormone
Which NPN compound is present in the highest concentration in blood and urine?
Blood urea nitrogen (BUN)
Which method of urea measurement is considered an 'indirect' method?
Enzymatic (indirect) method
Which NPN compound is formed spontaneously from creatine in muscle and excreted into urine through glomerular filtration?
Creatinine
Which of the following substances is not normally found in the filtrate due to its large molecular weight?
Protein-bound substances
What is the renal threshold plasma concentration for glucose?
~160-180 mg/dl
Which of the following waste products is primarily regulated through tubular secretion?
Uric acid
What is the normal glomerular filtration rate (GFR) in mL/min?
~120
Test your knowledge of renal function testing and non-protein nitrogen (NPN) substances with this quiz. Learn about the nephron, the functional unit of the kidney, and its role in filtering fluid and regulating essential substances in the blood.
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