IGCSE Biology / Homeostasis and excretion
Sweating, shivering and blood vessels
Edexcel International GCSE Biology (4BI1), chapter 8: Homeostasis and excretion, specification point 2.93. Part of the full course.
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The hypothalamus helps keep core body temperature near 37 °C by triggering responses to being too hot or too cold. These responses change heat loss or heat production, then switch off when temperature returns to normal.