Year 11 - Science
The role of the skin in thermoregulation
Coordination and control: maintaining a constant internal environment
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This pupil-friendly study guide includes a unit summary, clear notes, common mistakes, and quick questions with answers.
Unit Summary
This unit covers the importance of maintaining a constant internal environment, focusing on body temperature control, osmotic balance, and kidney function. It explains the roles of the skin, kidneys, and ADH, and emphasises data extraction, experiment techniques, and accurate data interpretation.
Lesson Summary
You will learn to describe the roles of various parts of the skin in controlling human body temperature.
Key Notes
- Human body temperature needs to be kept within a small range, around 37°C, to maintain body functions and health.
- Changes in the external environment can cause the internal body temperature to change.
- When temperature decreases, responses (erection of hairs, vasoconstriction) help to return body temperature to normal.
- When temperature increases, responses (sweating, vasodilation) help to return body temperature to normal.
Vocabulary To Learn
- vasoconstriction: The narrowing of blood vessels, reducing blood flow through them.
- insulation: A material that transfers energy by conduction very slowly or not at all.
- radiation: The process of emitting energy, often in the form of infrared waves, from an object.
- vasodilation: The widening of blood vessels, increasing blood flow through them.
Common Mistakes To Avoid
- Understanding why the physiological responses to higher or lower body temperatures occur is often confused, because although the processes themselves are familiar, the reasons behind them are not.
3 Quick Questions (With Answers)
1. Explain the scientific idea in this lesson using two key points.
Human body temperature needs to be kept within a small range, around 37°C, to maintain body functions and health. Changes in the external environment can cause the internal body temperature to change.
2. Define this scientific word and use it in context. 'vasoconstriction'
The narrowing of blood vessels, reducing blood flow through them. Include the word in a full scientific explanation, not as a single label.
3. Correct this common scientific misunderstanding.
Mistake: Understanding why the physiological responses to higher or lower body temperatures occur is often confused, because although the processes themselves are familiar, the reasons behind them are not. Correction: Detail has been included to explain carefully and one at a time the reasons for a range of physiological responses to high or low body temperature, and these are illustrated with clear, familiar diagrams.
More Lessons In This Unit
- Controlling water balance: the kidneys, and nephron structure Study Guide
- Controlling water balance: the kidneys, and treating kidney failure Study Guide
- Controlling water balance: the kidneys, nephron structure and kidney failure Study Guide
- Effect of osmosis and sugar concentration on the mass of plant tissue: analysis Study Guide
- Effect of osmosis and sugar concentration on the mass of plant tissue: practical Study Guide
- The importance of maintaining constant conditions in the body Study Guide
- The importance of maintaining constant conditions in the body, including osmosis Study Guide
- The role of the nervous system in thermoregulation Study Guide
- The roles of the nervous and endocrine systems in controlling water balance Study Guide
- Using a microscope to observe effects of osmosis in plant cells: practical Study Guide
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