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1. The diagram shows a sweat gland in a section of skin - Edexcel - GCSE Biology - Question 1 - 2013 - Paper 1
Question 1
1. The diagram shows a sweat gland in a section of skin. (a) Explain how the sweat gland helps to cool the body. (b) Draw one straight line from the definition to... show full transcript
Worked Solution & Example Answer:1. The diagram shows a sweat gland in a section of skin - Edexcel - GCSE Biology - Question 1 - 2013 - Paper 1
Step 1
Explain how the sweat gland helps to cool the body.
Answer
The sweat gland cools the body through the process of sweating. When the body temperature rises, sweat is produced and released onto the surface of the skin. As the sweat evaporates, it absorbs heat from the skin, which helps to lower the overall body temperature.
Step 2
Step 3
Describe how body hair helps to control a person’s temperature on a cold day.
Answer
On a cold day, body hair helps to control a person’s temperature by trapping air close to the skin. This trapped air acts as insulation, reducing heat loss from the body and helping to keep the person warm.