alleryStart learning →At roughly what bladder volume is the first urge to void sensed?
AAbout 50 mL
BAbout 300 mL
CAbout 500 mL
DAbout 150 mL
Answer & Solution
Correct answer: D. About 150 mL
1. Stretch receptors in the bladder wall report filling to the sacral cord.
2. At about 150 mL the first urge to void is felt, though it is easily overridden.
3. Later urges grow harder to ignore as filling continues.
4. The bladder can hold several times that volume, so 150 mL is a warning rather than a limit.
_Source: OpenStax Anatomy and Physiology (CC BY 4.0), Ch 25 "The Urinary System", section 25.2 Gross Anatomy of Urine Transport_
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