Drinking alcohol causes vasodilation of the blood vessels supplying the skin.
A person who has drunk alcohol may feel warm, even in cold weather.
Suggest why the person feels warm.
Explain why drinking alcohol in cold weather increases the risk of the core body temperature falling too low.
In cold weather, a person who has not drunk alcohol often has pale skin on their hands and feet.
Explain why.
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.