A person eats a meal and then rehearses under hot stage lights for one hour. The person then rests for two hours while the air temperature and light level remain unchanged.
At the start, the person's internal conditions were at their optimum levels.
| Measurement | At the start | After 1 hour | After 3 hours |
|---|---|---|---|
| Blood glucose concentration in mmol/dm³ | 5.0 | 7.6 | 5.3 |
| Core body temperature in °C | 37.0 | 37.6 | 37.1 |
| Air temperature in °C | 21.0 | 30.0 | 30.0 |
| Light level in lux | 350 | 900 | 900 |
Explain which measurements provide evidence that homeostasis is restoring internal conditions towards their optimum levels.
76 exam-style questions on AQA GCSE Biology 5.1 Homeostasis, covering 5.1 Homeostasis. Each one has a worked solution and a mark scheme showing where the marks go.