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. (2)
(b) Draw one straight line from the definition ... 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.
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Answer
The sweat gland helps to cool the body by producing sweat. When the body temperature rises, sweat is released onto the surface of the skin. As the sweat evaporates, it takes heat away from the skin, allowing the body to cool down.
Step 2
Draw one straight line from the definition to the keyword.
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Answer
Maintenance of a stable internal environment → homeostasis
Step 3
Describe how body hair helps to control a person’s temperature on a cold day.
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Answer
On a cold day, body hair helps to control temperature by standing upright due to the contraction of small muscles at the base of each hair. This creates an insulating layer of air which traps warmth close to the skin, helping to maintain the body's temperature.
