A girl waits at a bus stop on a cold winter day. After a few minutes she begins to shiver.
State what is meant by shivering.
Explain how shivering helps to raise body temperature.
The hairs on her arms are also raised.
Explain how this reduces heat loss from her skin.
Suggest why producing less sweat on a cold day helps to keep her body temperature constant.
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.