A scientist studied two responses that help to bring an internal condition back to its optimum level after a sudden change. To avoid harm, the correction must begin within 1 second of the change and must continue without a break for at least 10 minutes.
The table shows data for the two responses, A and B.
| Response | Time taken to start | Duration of effect |
|---|---|---|
| A | 0.4 seconds | 20 seconds |
| B | 15 seconds | 11 minutes |
Give the type of response represented by A.
Evaluate whether response A only, response B only or both responses together would meet the requirements.
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.