During a period without food, a person's blood glucose concentration changes.
Which pattern would show that the body's control system is limiting this change?
It stays at the same value for the whole period.
It falls steadily further below its normal range.
It rises and falls by large amounts as time passes.
It rises and falls slightly but stays close to its normal range.
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.