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In pairs, write down in order, which job uses most energy to that which uses least energy –

In pairs, write down in order, which job uses most energy to that which uses least energy – you may be asked to explain your decision!!! Soldier – not on active duty Salesperson Soldier – on active duty Nurse in A&E Lorry driver – no delivery involved Telephonist

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In pairs, write down in order, which job uses most energy to that which uses least energy –

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  1. In pairs, write down in order, which job uses most energy to that which uses least energy – you may be asked to explain your decision!!! Soldier – not on active duty Salesperson Soldier – on active duty Nurse in A&E Lorry driver – no delivery involved Telephonist Computer operator Farmer – sheep and cattle Labourer Doctor in A&E Teacher

  2. Homework • Complete the assessment on respiration AND mark the test from last week! I want you to become familiar with mark schemes

  3. Pages numbers 178-185Introduction to respiration Learning Outcomes: • Understand that chemical reactions within cells are controlled by enzymes • Can explain that respiration is a chemical reaction within in a cell that releases energy. • Can summarise respiration in a word equation.

  4. Introduction • What do you understand by the term respiration? nobody mention breathing…… Please • video clip from youtube • http://www.youtube.com/watch?v=Xp0o19gWX7E

  5. Where is Respiration carried out? • In mitochondria which are found in all cells. • Respiration makes energy needed: • 1)for growth & repair 2)movement 3) keeping warm 4)active transport. You need to be able to name the 4 things that respiration is needed for – note these down.

  6. Demo – screaming jelly babies • How does this demonstration compare to what happens in your body cells during respiration? • Write down your ideas in rough – you’ll need them later. • http://www.youtube.com/watch?v=tGrRBHxa9sQ

  7. Demo – screaming jelly babies • How does this demonstration compare to what happens in your body cells during respiration? • Write down your ideas in rough – you’ll need them later. • Reaction of a Jelly Baby with molten potassium chlorate, showing the energy locked up in a Jelly Baby. • At a simple level, the Jelly Baby is being burned in oxygen gas, which is similar to what happens when oxygen combines with glucose in the body to release the energy from food in respiration - but, thankfully, in a far more controlled fashion than that illustrated here!

  8. What is the equation for respiration? • Can you remember the word equation for aerobic respiration? • Write down these equations in your books, highlight them! – you need to be able to remember them!!! • Try the mix and match card sort

  9. Aerobic respiration: word equation energy glucose water oxygen carbon dioxide energy carbon dioxide glucose water oxygen

  10. Aerobic respiration: word equation activity

  11. What are the waste products in respiration? • Thinking about the equation you have just written down what are the waste products? – where are they excreted? • Blow on a mirror – what do you see? • Get a boiling tube and put a little lime water into it, goggles on and gently blow down a straw. What do you see? & what does this show?

  12. Waste products – limewater test straw limewater 1. Take a test tube of limewater, a clear liquid. 2. Blow gently through a straw into the limewater. 3. After a short time, the limewater turns cloudy. Limewater turns cloudy when carbon dioxide passes through. What does this test tell you about aerobic respiration? One waste product of aerobic respiration must be… …carbon dioxide.

  13. Waste products – see your breath test water vapour What happens when you breathe outonto a cold pane of glass? What happens when you breathe outon a freezing cold day? In both cases, you can see some of the air that you have breathed out. Why? Water vapour condenses into a liquid and becomes visible. What does this test tell you about aerobic respiration? Another waste product of aerobic respiration must be… …water.

  14. Reactants & Products of Respiration Can you label where glucose and oxygen enters the body and where carbon dioxide and water are lost

  15. This is a foundation question… A student wanted to improve her fitness. A sports physiologist recommended that the student joined an aerobics class. 2 (b) (i) What gas from the air does the student use to do aerobic exercises? ........................................................ (1 mark) 2 (b) (ii) Which organ in the student’s body removes this gas from the air? heart kidney liver lungs (1 mark) 2 (b) (iii) Which organ in the student’s body pumps this gas to the muscles? Heart kidney liver lungs (1 mark) 2 (c) When the student respires she releases energy. Where does the energy released by respiration come from? cellulose glucose fat protein (1 mark)

  16. Changes during exercise • Can describe and explain how breathing and heart rate changes during exercise. • Understands how muscles store glucose and how they access this store during exercise.

  17. Can you apply your knowledge? • Using the following key terms , write a paragraph about respiration. Describe what it is, where and how it happens. What is the energy used for? oxygen  carbon dioxide  lungs  blood  water mitochondria  heart  glucose energy cells Respiration is a process that takes place in the mitochondria of all cells in the body. It takes oxygen and glucose and creates energy. Carbon dioxide and water are produced as waste. The energy is used for growth & repair, keeping warm, movement and active transport. How does you answer compare to this? Can you add to your answer.

  18. What happens to our bodies when we begin to exercise? • My heart will beat faster to carry blood containing oxygen and glucose to my cells. • My breathing will quicken and deepen to gain more oxygen and lose more carbon dioxide. • My glycogen stores in my muscles will release more glucose.

  19. Your Table may look like this.. Informative headings. No units in the table – just in the headings.

  20. Energy and oxygen debt • When we exercise energy from respiration is used to contract muscles. • More muscles contractions means more glucose and oxygen are needed and more carbon dioxide is produced.

  21. Anaerobic Respiration Lesson Outcomes: • Can describe that if insufficient oxygen is reaching the muscles, they use anaerobic respiration. • Recall that anaerobic respiration is the incomplete breakdown of glucose, and produces lactic acid. • Recognise that anaerobic respiration releases much less energy . • Explain that ‘oxygen debt’ may occur in muscles.

  22. Introduction • Watch this video clip of Usain Bolt. What is Usainnot doing during the race? • http://www.youtube.com/watch?v=By1JQFxfLMM

  23. Anaerobic respiration: word equation energy glucose lactic acid energy lactic acid glucose

  24. Anaerobic respiration • Glucose Lactic Acid & Energy • Anaerobic respiration does not use oxygen, this means that lactic acid is produced. Lactic acid is toxic and makes your muscles ache. The amount of energy produced is much lower, this is why you can only sprint for short distances. After you stop you have an oxygen debt where the lactic acid is converted back to glucose. Can you now correct your own answer using the model answer for guidance.

  25. Review- Use a diagram like this to compare and contrast aerobic and anaerobic respiration.

  26. Which type of respiration?

  27. Multiple-choice quiz

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