Which statement correctly describes the epidermis?
It contains blood vessels and produces most of the sweat.
It contains blood vessels and detects core blood temperature.
It reduces uncontrolled water loss and contains no blood vessels.
It reduces uncontrolled water loss and produces most of the sweat.
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.