alleryStart learning →Approximately how much protein does a normal random urine sample contain?
AAbout 10 mg per 100 mL
BAbout 100 mg per 100 mL
CAbout 1 gram per 100 mL
DAbout 500 mg per 100 mL
Answer & Solution
Correct answer: A. About 10 mg per 100 mL
1. Protein does not normally leave the glomerular capillaries.
2. Only a trace crosses, roughly 10 mg per 100 mL in a random sample.
3. Anything substantially above that trace suggests the glomerulus is damaged and letting protein leak into the filtrate.
4. A gram per 100 mL would represent gross protein loss, not a normal finding.
_Source: OpenStax Anatomy and Physiology (CC BY 4.0), Ch 25 "The Urinary System", section 25.1 Physical Characteristics of Urine_
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