alleryAbout 180 litres of filtrate forms daily but only 1.5 litres of urine is released. This means roughly
A50 per cent is reabsorbed
B99 per cent is reabsorbed
C10 per cent is reabsorbed
Dnone is reabsorbed
Answer & Solution
Correct answer: B. 99 per cent is reabsorbed
1. Filtrate formed per day is about 180 litres.
2. Urine actually released is about 1.5 litres.
3. So nearly all of the filtrate returns to the blood: 1.5 out of 180 is under 1 per cent.
4. Nearly 99 per cent of the filtrate has to be reabsorbed.
5. This process is called reabsorption and is carried out by the renal tubules.
_Source: syllabus Biology Ch16 'Excretory Products and their Elimination', section 16.2_
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