A sensor records an internal condition. After a disturbance, the reading moves away from the optimum and then returns towards it. Which conclusion is best supported?
An effector has detected the stimulus and prevented information being processed.
A coordination centre has permanently fixed the condition at its maximum value.
A corrective response has opposed the effect of the original disturbance.
A receptor has increased the disturbance until the optimum was exceeded.
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.