The air temperature falls while a person is sitting outdoors.
Which structures first detect the change in temperature at the skin?
sweat glands in the dermis
sweat ducts in the epidermis
temperature receptors in the dermis
hair erector muscles in the dermis
44 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.