alleryApproximately how many nephrons does each human kidney contain?
AOne thousand
BTen thousand
COne hundred
DOne million
Answer & Solution
Correct answer: D. One million
1. The nephron is the functional unit, so their number sets the kidney's capacity.
2. Each kidney has nearly one million nephrons.
3. That reserve is why a person can live with one kidney.
4. Values in the thousands understate the count by three orders of magnitude.
_Source: syllabus Biology Ch16 'Excretory Products and their Elimination', section 16.1_
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