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Hormones & Behaviour
Topic 8: Hormones & Behaviour
Study this topic
1Introduction2Deep Dive3Diagram4How It Works5Definitions6Misconceptions7Memory Aid8Exam Focus9Summary10Exam Tips
The Story: The Emergency Broadcast
Adrenaline and Thyroxine: Two Hormones, Two Timescales
Endocrine Glands — Adrenaline and Thyroxine
How It Works: Adrenaline and the Fight-or-Flight Response
Key Definitions
Common Misconceptions
Memory Aids
Exam Focus
Knowledge Organiser
Exam Tips: Hormones and Behaviour
Sample Flashcards
What is adrenaline and what does it do?
Adrenaline is a hormone released by the adrenal glands (on top of the kidneys) during stress or danger. It prepares the body for 'fight or flight' — increasing heart rate and releasing glucose for energy.
Name three effects of adrenaline on the body.
1. Increases heart rate (more blood to muscles).
2. Raises blood glucose levels (provides energy).
3. Dilates pupils and increases breathing rate (heightens alertness).
Exam questions for Hormones & Behaviour
Which response does adrenaline prepare the body for?
State two effects of adrenaline on the body during a fight-or-flight response.
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