A researcher used three identical artificial-skin pads containing warmed gel to model sweating.
Each pad began at the same temperature in a cooler room.
All other conditions were kept the same.
| Time in minutes | Temperature of model A in ∘C^\circ\mathrm{C}∘C | Temperature of model B in ∘C^\circ\mathrm{C}∘C | Temperature of model C in ∘C^\circ\mathrm{C}∘C |
|---|---|---|---|
| 10 | 35.9 | 33.7 | 34.1 |
| 20 | 33.8 | 30.5 | 28.7 |
Calculate how many times as great the mean rate of temperature decrease was for model C compared with model A between 10 and 20 minutes.
The researcher continued the investigation after 20 minutes but stopped adding water to model C. Its surface was still wet.
Suggest how the temperature of model C would change during the next few minutes. Explain your answer.
Suggest which model, B or C, more closely represents sweating by a person whose core body temperature remains above the normal range for 20 minutes.
Use the information in the table and your biological knowledge.
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.