A runner begins exercising in a cold room. Receptors detect both falling skin temperature and rising carbon dioxide concentration. Which statement best explains why these changes may lead to different responses?
Both stimuli are processed only by the pancreas, which selects the response required.
Both stimuli activate the same gland, but the gland releases different muscle cells.
Each stimulus is processed by a coordination centre, which can activate different effectors.
Each receptor acts as an effector, so it directly restores the relevant internal condition.
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.