# Explain how adrenaline prepares the body for the 'fight-or-flight' response. Include in your answer where adrenaline is produced and describe FOUR effects it has on the body.

> Eduqas A-Level Biology — 4.1 Reproductive biology · Explain · 5 marks

## Mark scheme (5 marks)

1. Adrenaline is produced / released by the adrenal gland
2. Adrenaline increases heart rate / pulse rate
3. Adrenaline increases breathing rate
4. Adrenaline causes glycogen to be converted into glucose (to provide energy for respiration)
5. Adrenaline increases blood flow to muscles / causes pupils to widen (dilate)

## Key terms

- [adrenaline](https://www.gradenine.co.uk/glossary/adrenaline)
- [fight-or-flight](https://www.gradenine.co.uk/glossary/fight-or-flight)

## Related

- [Revision notes for Eduqas A-Level Biology](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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Source: [GradeNine](https://www.gradenine.co.uk/q/explain-how-adrenaline-prepares-the-body-d0ed6a6a) · Published by Druglandscape Ltd.