Edexcel IGCSE Biology · Spec 2.94-2.95B
Hormones
The endocrine system, the effects of adrenaline, and how insulin and glucagon control blood glucose.
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Hormones
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Spec 2.94-2.95B
What you need to know
- Describe the endocrine system
- Explain adrenaline and blood glucose control
- Recall the other key hormones for Triple
Active recall
Quick check
Answer each question before opening the answer.
What are the effects of adrenaline?
It increases heart rate, breathing rate and blood glucose — preparing the body for 'fight or flight'.
How is blood glucose controlled by the pancreas?
Insulin lowers it (glucose → glycogen in the liver); glucagon raises it (glycogen → glucose).
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