A person does not eat for several hours before a medical test. The person's normal blood glucose concentration is 5.0 mmol dm−35.0\,\mathrm{mmol\,dm^{-3}}5.0mmoldm−3.
The table shows measurements taken after their blood glucose concentration fell below normal.
| time / minutes | blood glucose concentration / mmol dm−3\mathrm{mmol\,dm^{-3}}mmoldm−3 | estimated mass of glycogen in the liver / g |
|---|---|---|
| 0 | 3.8 | 88 |
| 40 | 4.5 | 80 |
| 80 | 5.0 | 73 |
Explain the changes in both blood glucose concentration and the estimated mass of glycogen in the liver from 0 to 80 minutes.
Predict how the release of the hormone responsible for the changes in part (a) at 80 minutes compares with its release at 0 minutes. Explain 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.