Cell Biology Lesson 2 Anaerobic respiration Ms Merrall Remote Learning By the end of this lesson I will State what anaerobic respiration is Describe the difference between aerobic and anaerobic respiration ID: 1006488
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1. Year 10 Science (Biology) Cell BiologyLesson 2 – Anaerobic respirationMs Merrall Remote Learning
2. By the end of this lesson I will…State what anaerobic respiration is.Describe the difference between aerobic and anaerobic respirationExplain muscle fatigue and oxygen debtHave the opportunity to practise and get feedback for my work
3. The big picture: “Why is respiration so important?”Builds on knowledge from previous KS3 Respiration topicIt is vital for survivalPart of biology that will be covered at GCSE Links to lots of topics, such as chemistry and P.E!
4. “Do Now”1. What is the word equation for aerobic respiration?2. Where does respiration occur?3. What does aerobic mean?4. What are the waste products of aerobic respiration?5. What occurs in the alveoli? Glucose + oxygen Carbon dioxide + Water (+ energy)In cell within mitochondria With oxygen Water and carbon dioxide Gas exchange
5. Lack of OxygenC6H12O6 + 6 O2 6 H2O + 6 CO2 + Energy“If the body is not able to supply enough oxygen, aerobic respiration cannot take place and energy is not released!”
6. But we still need energy!The body still has a supply of glucose. The body can harness some energy from the glucose without oxygen.A by-product called lactic acid is produced.
7. AnaerobicWhat do you think Anaerobic means?“Anaerobic = Without Oxygen”O2
8. Anaerobic RespirationThe incomplete breakdown of glucose.Releases less energy than aerobic respiration – approx. 5%Temporary process.
9. Anaerobic Respiration EquationGlucose Lactic Acid + EnergyWhere does this occur?CellsIn the cytoplasm
10. Why would we get muscle cramps?Glucose Lactic Acid + EnergyLactic acid is poisonous to muscles.It stops them contracting and relaxing.They become fatigued.
11. Oxygen debt?Anaerobic respiration Glucose Lactic Acid + EnergyLactic acid needs to be broken down by oxygen to allow muscles to return to normalLactic acid + oxygen carbon dioxide + waterHence ‘oxygen debt.’
12. In plants and yeast....Glucose Ethanol + Carbon dioxide
13. In plants and yeast....Glucose Ethanol + Carbon dioxideIn yeast, this is called fermentation
14. Sort the following:Requires oxygenReleases the most energyIn plants and yeast, it releases CO2 and ethanolProduces carbon dioxide and waterReleases the least energyProduces ethanol (in yeast/plants)Involves incomplete oxidation of glucoseProduces lactic acidOccurs when there is no oxygen available■Aerobic ■Anaerobic
15. Progress CheckWhat is the word equation for anaerobic respiration?How much energy does it release compared to aerobic respiration?What is produced during anaerobic respiration in animals?What is produced during anaerobic respiration in plants/yeast?How do we make use of anaerobic respiration in yeast?
16. Progress Check - answersWhat is the word equation for anaerobic respiration?How much energy does it release compared to aerobic respiration?What is produced during anaerobic respiration in animals?What is produced during anaerobic respiration in plants/yeast?How do we make use of anaerobic respiration in yeast?Glucose Lactic acid + Energy Approx. 5%Lactic acid + EnergyEthanol + Carbon dioxideTo produce beer, wine and bread
17. Your Task Complete the task at the end of this videoTake a picture of your answers and email the photo to my school email address. If you are stuck, need help or feedback feel free to email me or join in on the live zoom session to go through the answers together.
18. By the end of this lesson I will…State what anaerobic respiration is.Describe the difference between aerobic and anaerobic respirationExplain muscle fatigue and oxygen debtHave the opportunity to practise and get feedback for my work
19. Respiration in athletics The blood of an athlete was tested before, during and after a 400m race:TASK – explaining muscle fatigue and oxygen debt
20. Complete the following table about each section of the race:Section of raceStrategyAnaerobic or aerobic respiration?ExplanationA to BSprint startAnaerobic respirationSudden increase in exercise, not enough oxygen, respires anaerobically, produces lactic acid, and causes increase in lactic acid levels. B to CStops accelerating and maintains pace C to DSprint finish D to E (after the race has finished)Warm down, then rest