How can humans sleep 8-10 hours without urinating themselves but can only go 30min-2hours when awake without having to urinate?

Question

How can humans sleep 8-10 hours without urinating themselves but can only go 30min-2hours when awake without having to urinate?

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Answer 1

Your brain releases a hormone called ADH (anti-diuretic hormone). This hormone affects the kidneys, especially when sleeping. ADH causes your kidneys to reduce the amount of fluid they pull from the blood. Less fluid filtered out by the kidneys means that less urine is produced.