Reabsorption — Science definition
Taking useful substances back from the filtrate into the blood, often by active transport against a gradient, which is why the kidney is so energy-hungry.
Where it is taught
- Kidneys, Excretion & Internal Balance — Body Organization, Transport & Movement, Life Science & Scientific Inquiry, Grade 7
In use
Then comes reabsorption: as the filtrate travels along a tubule, the useful substances are taken back into the blood, glucose almost entirely, water and salts in amounts the body adjusts.
Kidneys, Excretion & Internal Balance