alleryStart learning →How many times over is the entire blood volume filtered through the kidneys in a day?
AAbout 3 times per day
BAbout 30 times per day
CAbout 3000 times per day
DAbout 300 times per day
Answer & Solution
Correct answer: D. About 300 times per day
1. Roughly a fifth of the cardiac output passes through the kidneys, minute after minute.
2. Over a full day that adds up to filtering the entire blood volume about 300 times.
3. Ninety-nine percent of the water filtered is recovered, or such a rate would be fatal within minutes.
4. A rate of three times a day could not clear the daily load of wastes and drugs the kidney handles.
_Source: OpenStax Anatomy and Physiology (CC BY 4.0), Ch 25 "The Urinary System", section 25.5 Physiology of Urine Formation_
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