A kayaker sees a large wave approaching and must paddle quickly to move away. The adrenal glands release adrenaline.
The table shows measurements taken before and after the adrenaline is released.
| Measurement | Before adrenaline is released | After adrenaline is released |
|---|---|---|
| blood glucose concentration in mmol dm−3^{-3}−3 | 4.8 | 6.8 |
| blood flow to the arm muscles in dm3^{3}3 min−1^{-1}−1 | 0.9 | 2.1 |
Describe the changes shown in the table.
Explain how the changes shown in the table help the kayaker paddle quickly.
89 exam-style questions on Edexcel GCSE Biology 7.1 Hormones and coordination, covering 7.1.1 Endocrine glands and hormone transport, 7.1.2 Adrenalin and fight or flight, and 7.1.3 Thyroxine and negative feedback. Each one has a worked solution and a mark scheme showing where the marks go.