Year 9 - Science
Cellular respiration
Breathing and respiration
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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 explores the human gas exchange system, breathing mechanisms, and adaptations for function. It covers aerobic and anaerobic respiration, including fermentation, and compares their processes and implications. Focus is on accuracy, reliable measurements, and SI units.
Lesson Summary
You will learn to describe what cellular respiration is and explain why it happens in all living organisms all the time.
Key Notes
- Cellular respiration is a chemical process that uses glucose, from food, as a fuel to provide energy for life processes.
- Examples of life processes that require energy from cellular respiration.
- Cellular respiration happens in all living organisms all the time to provide the energy to keep them alive.
- Differences between breathing and respiration.
Vocabulary To Learn
- cell: A cell is the smallest living building block of an organism.
- cellular respiration: Cellular respiration is a chemical process that uses glucose, from food, as a fuel to provide energy for life processes.
- glucose: Glucose is a sugar that our cells use as fuel for cellular respiration.
- breathing: Breathing is the process in which air is moved in and out of the lungs.
- mitochondria: Mitochondria are cell organelles in which cellular respiration takes place in animals and plants.
Common Mistakes To Avoid
- Thinking that only animals respire, and that plants only photosynthesise (and do not respire).
3 Quick Questions (With Answers)
1. Explain the scientific idea in this lesson using two key points.
Cellular respiration is a chemical process that uses glucose, from food, as a fuel to provide energy for life processes. Examples of life processes that require energy from cellular respiration.
2. Define this scientific word and use it in context. 'cell'
A cell is the smallest living building block of an organism. Include the word in a full scientific explanation, not as a single label.
3. Correct this common scientific misunderstanding.
Mistake: Thinking that only animals respire, and that plants only photosynthesise (and do not respire). Correction: This lesson uses examples of plants respiring in order to address this misconception.
More Lessons In This Unit
- Adaptations of the human lungs for gas exchange Study Guide
- Aerobic cellular respiration Study Guide
- Anaerobic cellular respiration and fermentation in microorganisms Study Guide
- Anaerobic cellular respiration in humans Study Guide
- Breathing, respiration and gas exchange Study Guide
- Estimating lung volume Study Guide
- The human gas exchange system and breathing Study Guide
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