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Interactive tool -- concept map, worked example & exam questions
Connect ADH to the kidneys, then real exam questions on ADH and kidney treatment
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MyGCSEScience · AQA Biology
Water Balance & Excretion (Kidneys) — watch on MyGCSEScience
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FreeScienceLessons · AQA BiologyThe Kidneys (Triple)
Key facts
Kidney function — fill in the table
| Aspect | Detail |
|---|
| Kidney role | |
| Urea | |
| Filtration | |
| Selective reabsorption | |
| Urine pathway | |
Kidney failure treatment — fill in the table
| Aspect | Detail |
|---|
| Dialysis | |
| Kidney transplant | |
| Transplant advantages | |
| Transplant risks | |
| ADH | |
Exam questions — 3 questions · 9 marks
⚡ Extended questions included. Read the hint. Write in full sentences. AI marks against the AQA mark scheme.
1 markUrea productionAQA 8461 P2 style
Where is urea produced and from what?
A In the kidneys from the breakdown of red blood cells
B In the liver from the deamination (breakdown) of excess amino acids
C In the small intestine from the digestion of proteins
D In the kidneys from filtering nitrogenous compounds from food
1 markDialysis principleAQA 8461 P2 style
How does a dialysis machine remove waste from the blood?
A It filters blood using high pressure to force waste through a membrane
B Waste products diffuse across a partially permeable membrane from the blood (high concentration) into dialysis fluid (low concentration)
C It uses enzymes to break down waste products in the blood
D It removes all small molecules from the blood and replaces them with clean fluid
4 marksCompare dialysis and transplantAQA 8461 P2 style
Compare dialysis and kidney transplant as treatments for kidney failure. Consider advantages and disadvantages of each. (4 marks)
Hint: Cover advantages AND disadvantages of BOTH treatments. At least two points per treatment.
+40 XP
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