A researcher investigated the responses of a person wearing a garment containing tubes of cool water.
The researcher estimated the rate of energy transfer by respiration in the person's skeletal muscles and measured the mean angle of hairs to the skin surface. An angle of 90° would mean that a hair was upright.
| Time wearing the garment in minutes | Core body temperature in °C | Estimated rate of energy transfer by respiration in skeletal muscles in W | Mean angle of hairs to the skin surface in ° |
|---|---|---|---|
| 0 | 37.0 | 20 | 18 |
| 12 | 36.4 | 75 | 52 |
Explain how the two responses shown by the data help to return core body temperature towards the normal range.
Suggest how the two measured values will change as core body temperature returns to the normal range. Explain your answer.
78 exam-style questions on Edexcel GCSE Biology 7.3 Homeostasis and thermoregulation, covering 7.3.1 Importance of a constant internal environment, 7.3.2 Importance of homeostasis, 7.3.3a Thermoregulation via the skin and hypothalamus, and 7.3.3b Vasoconstriction and vasodilation in thermoregulation. Each one has a worked solution and a mark scheme showing where the marks go.