# Explain how the body responds when blood glucose concentration falls below the normal level.

> WJEC GCSE Biology (Wales) — 2.5.3 Homeostasis · Explain · 4 marks

> A student skips breakfast and goes for a long run. By the end of the run, their blood glucose concentration has dropped below the normal level.

## Mark scheme (4 marks)

1. The pancreas detects the fall in blood glucose concentration
2. The pancreas releases glucagon
3. Glucagon causes the liver to convert glycogen into glucose
4. Blood glucose concentration returns to / rises back to the normal level

## Key terms

- [blood glucose concentration](https://www.gradenine.co.uk/glossary/blood-glucose-concentration)

## Related

- [Revision notes for WJEC GCSE Biology (Wales)](https://www.gradenine.co.uk/learn)
- [How to answer "Explain" questions](https://www.gradenine.co.uk/tools/command-word-cheatsheet)
- [Practice this with AI marking (free)](https://www.gradenine.co.uk/start)

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