Researchers grow a replacement layer for damaged human skin. They attach the replacement layer to living tissue and compare it with healthy human epidermis.
| Measurement or observation | Healthy human epidermis | Replacement layer after attachment |
|---|---|---|
| Position | outer surface | outer surface |
| Blood vessels present | no | no |
| Mean mass of water lost through 100 cm² in 24 hours in g | 1.8 | 6.3 |
The researchers claim that the replacement layer is equivalent to healthy human epidermis.
Use the results to evaluate the researchers' claim.
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.