AQA GCSE Biology · 8461
Specification 4.5.3.3 · Paper 2
Revise: Kidney Function and Water ControlSelective reabsorption is therefore needed to recover useful substances.
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GCSE Biology · key term
The return of particular useful substances from the kidney tubules to the blood according to the body’s needs.
Used by AQA and Edexcel
Specification 4.5.3.3 · Paper 2
Revise: Kidney Function and Water ControlSelective reabsorption is therefore needed to recover useful substances.
Specification 7.19B · Paper 2
The return of useful substances from the filtrate in a nephron to the blood.
Revise: Selective Reabsorption in the NephronFiltration does not separate useful glucose from waste urea, so the nephron must recover substances the body needs before the remaining fluid becomes urine. This return from the filtrate to the surrounding blood is called selective reabsorption.
Do not describe filtration as removing only wastes. Small useful substances, including glucose, water and ions, enter the filtrate too; selective reabsorption then returns what the body needs.
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