Edexcel IGCSE Biology · Spec 2.93
Temperature Control
How the body keeps a constant core temperature — cooling down when too hot and warming up when too cold.
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Temperature Control
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Spec 2.93
What you need to know
- Explain why we control body temperature
- Describe how the body cools down
- Describe how the body warms up
Active recall
Quick check
Answer each question before opening the answer.
How does the body respond when it is too hot?
Vasodilation (more blood to skin surface), sweating, and hairs lie flat — all increase heat loss.
How does the body respond when it is too cold?
Vasoconstriction, shivering, and hairs stand up to trap air — all reduce heat loss or generate heat.
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