Edexcel IGCSE Biology 2.93 The eye
Practise applying skin thermoregulation to hot, cold and exercise contexts, including sweat-rate graphs and blood-vessel changes.
- Syllabus
- First assessment 2019
- Course
- Biology 4BI1
Exam points
- describe vasodilation or vasoconstriction using arterioles, capillaries and heat loss at the skin
- explain sweating during exercise as evaporation that removes heat and helps maintain body temperature
- calculate sweat volume from graph readings by converting a rate over a given time interval
2.93 Skin and temperature regulation question 1
The skin is an organ involved in temperature regulation.
The diagram shows a section of human skin.
Explain how the skin capillaries regulate body temperature when the body temperature increases.
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