Learning objective
Describe water, ions and urea loss from the skin in sweat.
Read the explanation, check the common trap, then practise with flashcards and questions.
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Topic
Hormonal coordination in humans
Subtopic
Maintaining water and nitrogen balance in the body (biology only)
Study support
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Quick explanation
Describe water, ions and urea loss from the skin in sweat
- This point belongs to Hormonal coordination in humans, especially Maintaining water and nitrogen balance in the body (biology only).
- You need to be able to describe water, ions and urea loss from the skin in sweat.
- The key ideas to know are skin, urea, and sweat.
- Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.
Key concepts
Why it matters
This objective helps connect Maintaining water and nitrogen balance in the body (biology only) to exam-style questions, flashcards, and revision notes for Hormonal coordination in humans.
Quick student answer
What are water, ions and urea loss from the skin in sweat?
Direct answer
In Biology, this page helps you answer questions about water, ions and urea loss from the skin in sweat within Hormonal coordination in humans. Focus on the key process, correct scientific terms, and how the idea links to exam-style questions. Key terms to check are sweat and urea.
Key terms
- sweat: A fluid produced by sweat glands in the skin that helps regulate body temperature and excretes water, ions, and urea.
- urea: In Maintaining water and nitrogen balance in the body (biology only), urea means a waste product formed from the breakdown of proteins, which is excreted in sweat and urine. This matters in Hormonal coordination in humans because it supports the learning objective to describe water, ions and urea loss from the skin in sweat. Use urea only in this subtopic-relevant sense so the definition stays concise, curriculum-specific, and useful for AQA GCSE Biology revision. Students should use this term accurately when they explain the biology, identify symptoms, or justify an answer in GCSE Biology questions.
Common trap
Misunderstanding Sweat Composition: Emphasize that sweat contains not only water but also ions (like sodium and potassium) and urea, which are lost during sweating.
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Revision notestopic notes
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Open revision notesRelated learning objectives
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- Compare hormonal coordination with nervous coordination in terms of speed and duration of response.
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- Describe the pituitary gland as a master gland that secretes several hormones into the blood.
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- Explain that pituitary hormones act on other glands to stimulate the release of other hormones.
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