A researcher circulates a glucose solution through living liver tissue. The glucose concentration of the solution entering the tissue remains at 8.0 mmol dm−38.0\,\mathrm{mmol\,dm^{-3}}8.0mmoldm−3.
Insulin is added at time 0. The table shows the results.
| Time after adding insulin / min | Glucose concentration of solution leaving the tissue / mmol dm−3\mathrm{mmol\,dm^{-3}}mmoldm−3 | Glycogen in the liver tissue / mg g−1\mathrm{mg\,g^{-1}}mgg−1 |
|---|---|---|
| 0 | 8.0 | 24 |
| 10 | 7.2 | 28 |
| 20 | 6.4 | 33 |
| 30 | 5.8 | 37 |
Explain the results in the table and predict how the rate of insulin release would change if the same changes occurred in a healthy person. 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.