CAIE A Level Biology 9700 · Homeostasis
A student measured her blood glucose concentration at intervals after eating a carbohydrate-rich meal. The results are shown in the table below.
| Time after meal (minutes) | Blood glucose concentration (mmol dm) |
|---|---|
| 0 | 4.5 |
| 30 | 7.2 |
| 60 | 6.8 |
| 90 | 5.3 |
| 120 | 4.6 |
Describe the homeostatic mechanism that returns the blood glucose concentration to the set point after the meal.
4 marks, so the mark scheme is looking for about 4 separate creditworthy points. Making the same point twice in different words earns it once.
Describe means: Say what happens or what something is like, in order and with detail. You are not being asked why. If there is data, quote it: name the trend, then give figures with units at the points where it changes.
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