Edexcel IGCSE Biology · Spec 2.77B-2.79B
Water Balance and Kidney Failure
How ADH controls the water content of the blood by negative feedback, and treatments for kidney failure.
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Water Balance and Kidney Failure
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Spec 2.77B-2.79B
What you need to know
- Explain how the hormone ADH controls water content
- Describe the negative feedback loop
- Compare dialysis and a kidney transplant
Active recall
Quick check
Answer each question before opening the answer.
Which hormone controls water reabsorption, and how?
ADH — it makes the collecting duct more permeable so more water is reabsorbed, producing less, more concentrated urine.
Name two treatments for kidney failure.
Dialysis and a kidney transplant.
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