13 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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3.27B Selective reabsorption of glucose
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Explain how glucose is reabsorbed in the proximal convoluted tubule.
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Total for this question: 3 marks
3.27B Selective reabsorption of glucose
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Explain why the reabsorption of glucose is described as selective.
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Total for this question: 2 marks
3.27B Selective reabsorption of glucose
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Which process moves glucose from the filtrate back into the blood?
(1)Total for this question: 1 mark
3.27B Selective reabsorption of glucose
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Illustrative data.
| Blood glucose / mg per 100 cm³ | Glucose in urine / mg per 100 cm³ |
|---|---|
| 80 | 0 |
| 120 | 0 |
| 160 | 0 |
| 200 | 15 |
| 240 | 60 |
| 280 | 110 |
Plot a graph of the results in the table. Join your points with straight lines using a ruler.
(5)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: 5 marks
3.27B Selective reabsorption of glucose
Exam question
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| Blood glucose / mg per 100 cm³ | Glucose in urine / mg per 100 cm³ |
|---|---|
| 80 | 0 |
| 120 | 0 |
| 160 | 0 |
| 200 | 15 |
| 240 | 60 |
| 280 | 110 |
Explain why glucose appears in the urine only above a blood glucose concentration of 160 mg per 100 cm³.
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Total for this question: 3 marks
3.27B Selective reabsorption of glucose
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Suggest why a person with untreated type 1 diabetes passes large volumes of urine.
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Total for this question: 2 marks
3.27B Selective reabsorption of glucose
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Explain why cyanide, which stops respiration, causes glucose to appear in urine.
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Total for this question: 2 marks
3.27B Selective reabsorption of glucose
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State two substances that are selectively reabsorbed in the proximal convoluted tubule.
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Total for this question: 2 marks
3.27B Selective reabsorption of glucose
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Describe how the cells lining the proximal convoluted tubule are adapted for reabsorption.
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Total for this question: 2 marks
3.27B Selective reabsorption of glucose
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Compare the reabsorption of glucose and of water.
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Total for this question: 2 marks
3.27B Selective reabsorption of glucose
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In a healthy person, how much of the filtered glucose is reabsorbed?
(1)Total for this question: 1 mark
3.27B Selective reabsorption of glucose
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A person filters 180 g of glucose per day. Urine contains 0 g. Calculate the mean mass of glucose reabsorbed per hour.
(2)Total for this question: 2 marks
3.27B Selective reabsorption of glucose
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Predict the effect on urine glucose of a drug that blocks the glucose carriers in the proximal tubule. Explain.
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Total for this question: 2 marks
