A person goes outside on a very cold day. Their core body temperature falls slightly and is then returned to its optimum level.
Describe how automatic control systems keep the internal conditions of the human body at an optimum level. In your answer you should refer to receptors, coordination centres and effectors.
40 exam-style questions on AQA GCSE Biology 5.1 Homeostasis, covering 5.1 Homeostasis. Each one has a worked solution and a mark scheme showing where the marks go.