A group of ten professional divers complete a cold-water survival trial to test thermoregulation. Medical researchers record the core body temperature of each participant immediately upon exiting the water.
| Diver | Core body temperature (∘C^\circ\text{C}∘C) |
|---|---|
| 1 | 34.6 |
| 2 | 35.2 |
| 3 | 34.9 |
| 4 | 35.0 |
| 5 | 34.5 |
| 6 | 35.1 |
| 7 | 34.8 |
| 8 | 35.3 |
| 9 | 34.7 |
| 10 | 35.4 |
Calculate the mean core body temperature of the ten divers. Give your answer to 1 decimal place.
If a diver's core body temperature is strictly below 35.0∘C35.0^\circ\text{C}35.0∘C, they are classified as hypothermic. What percentage of the divers would be classified as hypothermic?
22 exam-style questions on OCR GCSE Biology 3.3 Maintaining internal environments, covering 3.3.1 Importance of a constant internal environment, 3.3.2 The skin and body temperature, 3.3.3 Insulin and blood sugar, 3.3.4 Glucagon and blood sugar, 3.3.5 Type 1 and type 2 diabetes, 3.3.6 Osmotic changes in body fluids, 3.3.7 Kidneys and water balance, 3.3.8 Structure of the kidney and tubule, 3.3.9 ADH and kidney tubule permeability, and 3.3.10 Responses to temperature and osmotic challenges. Each one has a worked solution and a mark scheme showing where the marks go.