The table shows measurements taken from a person before and during a frightening event.
Table
| Measurement | Before | During |
|---|---|---|
| Heart rate in beats per minute | 72 | 108 |
| Blood glucose concentration in mmol per litre | 4.8 | 6.0 |
Which pair gives the percentage increases in heart rate and blood glucose concentration?
Heart rate: 36%36\%36%; blood glucose: 12%12\%12%.
Heart rate: 25%25\%25%; blood glucose: 50%50\%50%.
Heart rate: 50%50\%50%; blood glucose: 25%25\%25%.
Heart rate: 150%150\%150%; blood glucose: 125%125\%125%.
42 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.