A volunteer rests in a temperature-controlled room. The room is made warmer.
The table shows measurements before the room was warmed and 20 minutes after it was warmed.
| Measurement | Before warming | 20 minutes after warming |
|---|---|---|
| Core body temperature in °C | 37.0 | 37.4 |
| Blood flow near the skin surface in cm³ per minute | 300 | 480 |
Calculate the percentage increase in blood flow near the skin surface.
Explain how the volunteer's body caused the increase in blood flow near the skin surface and how this increase helps to lower the core body temperature.
7 exam-style questions on AQA GCSE Biology 5.2.4 Control of body temperature. Each one has a worked solution and a mark scheme showing where the marks go.