Two mammals, P and Q, each have damage to either the liver or the kidneys. Each mammal has damage to only one of these organs. They have the same body mass and eat the same diet.
The table compares measurements from mammals P and Q with measurements from a healthy mammal.
| Mammal | Blood urea concentration in mmol dm−3\mathrm{mmol\,dm^{-3}}mmoldm−3 | Urea passed in urine in mmol h−1\mathrm{mmol\,h^{-1}}mmolh−1 |
|---|---|---|
| healthy | 5.0 | 18 |
| P | 2.1 | 7 |
| Q | 10.4 | 6 |
Explain which organ is damaged in mammal P and which organ is damaged in mammal Q. Use the data in your answer.
94 exam-style questions on Edexcel GCSE Biology 7.4 Blood glucose and the urinary system, covering 7.4.1 Insulin and blood glucose control, 7.4.2 Glucagon and blood glucose regulation, 7.4.3 Type 1 and type 2 diabetes, 7.4.4 Structure of the urinary system, 7.4.5 Structure and function of the nephron, 7.4.6 ADH and water regulation, 7.4.7 Treatments for kidney failure, and 7.4.8 Production of urea in the liver. Each one has a worked solution and a mark scheme showing where the marks go.