A swimmer leaves a swimming pool and waits in a cool changing room. The swimmer's core body temperature begins to fall below 37 °C.
The table shows two possible changes in the blood vessels supplying the skin capillaries.
| Row | Width of the blood vessels | Blood flow near the skin surface |
|---|---|---|
| X | increases | increases |
| Y | decreases | decreases |
Give the row that shows the change caused by the fall in core body temperature.
The swimmer's skeletal muscles begin to contract and relax rapidly.
Give the name of this response.
A medicine reduces the frequency of these muscle contractions.
Predict the effect on the time taken for the swimmer's core body temperature to return to 37 °C. Explain your answer.
A control centre in the brain contains receptors that detect the temperature of the blood. The centre coordinates responses when body temperature changes.
Give the name of this control centre.
7 exam-style questions on AQA GCSE Biology 5.2.4 Control of body temperature. Each one has a worked solution and a mark scheme showing where the marks go.