The diagram shows a section through human skin. (a) (i) Complete the sentence by putting a cross (X) in the box next to your answer. The maintenance of a stable internal environment is called A ☐ speciation B ☑ homeostasis C ☐ hybridisation D ☐ variation (ii) Explain how sweat glands can help the human body to cool down.

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The diagram shows a section through human skin - Edexcel - GCSE Biology - Question 1 - 2016 - Paper 1

Question 1

The diagram shows a section through human skin. (a) (i) Complete the sentence by putting a cross (X) in the box next to your answer. The maintenance of a stable in... show full transcript

Worked Solution & Example Answer:The diagram shows a section through human skin - Edexcel - GCSE Biology - Question 1 - 2016 - Paper 1

Step 1

(i) Complete the sentence by putting a cross (X) in the box next to your answer.

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Answer

The correct answer is B: homeostasis. Homeostasis refers to the processes that maintain a stable internal environment within an organism, despite external changes.

Step 2

(ii) Explain how sweat glands can help the human body to cool down.

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Answer

Sweat glands play a crucial role in thermoregulation by producing sweat. When the body temperature rises, the sweat glands secrete sweat onto the surface of the skin. As the sweat evaporates, it absorbs heat from the body, which cools the skin and helps lower the internal body temperature. This process of evaporative cooling is vital for maintaining physiological balance, especially during hot weather or physical exertion.

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