During a supervised endurance test, a person's pancreas releases hormone X at 0 minutes.
The person's normal blood glucose concentration is between 0.80 and 1.00 g/dm³.
| Time after hormone X is released in minutes | Blood glucose concentration in g/dm³ | Glycogen stored in the liver in g |
|---|---|---|
| 0 | 0.60 | 80 |
| 10 | 0.68 | 76 |
| 20 | 0.76 | 70 |
| 30 | 0.84 | 64 |
Explain how the data support the conclusion that hormone X is glucagon.
In a second test, the person has only 8 g of glycogen stored in the liver at 0 minutes. All other conditions are unchanged.
Predict the person's blood glucose concentration at 30 minutes relative to the result in the table. Explain your answer.
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.