14 exam-style questions · Biology only (B): not in Science (Double Award). Write your answer, check it against the mark scheme and tick the points you earned. Your marks stay on this device. Your writing is not saved.
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3.22B Excretion and osmoregulation by the kidney
Exam question
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State the two main functions of the kidneys.
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Total for this question: 2 marks
3.22B Excretion and osmoregulation by the kidney
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Explain what is meant by osmoregulation.
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Total for this question: 2 marks
3.22B Excretion and osmoregulation by the kidney
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Explain why osmoregulation is important for cells.
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Total for this question: 3 marks
3.22B Excretion and osmoregulation by the kidney
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Which statement describes osmoregulation?
(1)Total for this question: 1 mark
3.22B Excretion and osmoregulation by the kidney
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Describe how the kidneys respond when a person drinks a large volume of water.
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Total for this question: 2 marks
3.22B Excretion and osmoregulation by the kidney
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Describe how the kidneys respond when a person is dehydrated.
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Total for this question: 2 marks
3.22B Excretion and osmoregulation by the kidney
Exam question
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Illustrative data from a student volunteer study.
| Time / min | Water / cm³ per 15 min | Salt solution / cm³ per 15 min |
|---|---|---|
| 0 | 20 | 20 |
| 30 | 150 | 25 |
| 60 | 250 | 30 |
| 90 | 120 | 25 |
| 120 | 40 | 20 |
Plot both sets of results on one graph. Join your points with straight lines using a ruler.
(6)Graph skills: SLAPUK and choosing a scale
Write your answer, then press Show model answer and tick each mark point your answer makes. Your answer is not saved.
Total for this question: 6 marks
3.22B Excretion and osmoregulation by the kidney
Exam question
Mark points shown after marking
| Time / min | Water / cm³ per 15 min | Salt solution / cm³ per 15 min |
|---|---|---|
| 0 | 20 | 20 |
| 30 | 150 | 25 |
| 60 | 250 | 30 |
| 90 | 120 | 25 |
| 120 | 40 | 20 |
Explain the difference between the results after drinking water and after drinking salt solution.
(3)Write your answer, then press Show model answer and tick each mark point your answer makes. Your answer is not saved.
Total for this question: 3 marks
3.22B Excretion and osmoregulation by the kidney
Exam question
Mark points shown after marking
| Time / min | Water / cm³ per 15 min | Salt solution / cm³ per 15 min |
|---|---|---|
| 0 | 20 | 20 |
| 30 | 150 | 25 |
| 60 | 250 | 30 |
| 90 | 120 | 25 |
| 120 | 40 | 20 |
Suggest two variables that should be controlled in this investigation.
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Total for this question: 2 marks
3.22B Excretion and osmoregulation by the kidney
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Explain why urine is paler on a cold day than on a hot day.
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Total for this question: 2 marks
3.22B Excretion and osmoregulation by the kidney
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Explain why marathon runners can become dangerously ill if they drink too much plain water.
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Total for this question: 2 marks
3.22B Excretion and osmoregulation by the kidney
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Illustrative context: desert mammals.
Suggest why desert animals such as kangaroo rats have very long loops of Henle.
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Total for this question: 2 marks
3.22B Excretion and osmoregulation by the kidney
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State the organ that detects changes in the water content of the blood.
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Total for this question: 1 mark
3.22B Excretion and osmoregulation by the kidney
Exam question
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Explain why the kidneys must remove water even when the body is short of water.
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Total for this question: 2 marks
