A volunteer eats a meal immediately after the first measurement. The volunteer's blood glucose concentration is then measured for 120 minutes.
| Time in minutes | Blood glucose concentration in mmol dm−3\mathrm{mmol\,dm^{-3}}mmoldm−3 |
|---|---|
| 0 | 4.9 |
| 30 | 6.8 |
| 60 | 7.4 |
| 90 | 6.0 |
| 120 | 5.1 |
Which conclusion about the volunteer's response is supported by the results?
The fall from 7.4 to 5.1 mmol dm−3\mathrm{mmol\,dm^{-3}}mmoldm−3 indicates that a corrective response opposes the effect of the meal.
The rise from 4.9 to 7.4 mmol dm−3\mathrm{mmol\,dm^{-3}}mmoldm−3 indicates that effectors reinforce the disturbance caused by eating.
The fall from 7.4 to 5.1 mmol dm−3\mathrm{mmol\,dm^{-3}}mmoldm−3 indicates that glucose leaves the blood by osmosis after eating.
The rise from 4.9 to 7.4 mmol dm−3\mathrm{mmol\,dm^{-3}}mmoldm−3 indicates that respiration adds glucose to the blood after eating.
78 exam-style questions on Edexcel GCSE Biology 7.3 Homeostasis and thermoregulation, covering 7.3.1 Importance of a constant internal environment, 7.3.2 Importance of homeostasis, 7.3.3a Thermoregulation via the skin and hypothalamus, and 7.3.3b Vasoconstriction and vasodilation in thermoregulation. Each one has a worked solution and a mark scheme showing where the marks go.