A person who does not have diabetes is given a glucose solution directly into a vein.
The table shows measurements taken during the next 90 minutes.
| Time in minutes | Blood glucose concentration in mmol/dm³ | Estimated mass of glycogen stored in the liver in g |
|---|---|---|
| 0 | 4.9 | 82 |
| 30 | 8.1 | 84 |
| 60 | 6.4 | 91 |
| 90 | 5.0 | 96 |
Explain the changes in blood glucose concentration and the mass of glycogen stored in the liver between 30 and 90 minutes.
The investigation is repeated using a person with untreated type 1 diabetes. Both people have 82 g of glycogen stored in the liver at the start and receive the same dose of glucose under otherwise comparable conditions.
Explain how both measurements for the person with type 1 diabetes at 90 minutes would be different from those shown in the table.
85 exam-style questions on AQA GCSE Biology 5.3 Hormonal coordination in humans, covering 5.3.1 Human endocrine system, 5.3.2 Control of blood glucose concentration, 5.3.3 Maintaining water and nitrogen balance in the body, 5.3.4 Hormones in human reproduction, 5.3.5 Contraception, 5.3.6 The use of hormones to treat infertility (HT only), and 5.3.7 Negative feedback (HT only). Each one has a worked solution and a mark scheme showing where the marks go.