A person stands outside on a very cold day and their body temperature starts to fall below its optimum level. Cells P detect this change and send impulses to structure Q. Structure Q then sends impulses to muscles R. Muscles R contract repeatedly, which releases heat that raises the body temperature.
Name the component represented by Q. Explain what is likely to happen to the person's body temperature if Q stops working while the temperature is below its optimum level.
76 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.