Aerobic-and-Anaerobic-Respiration.pptx

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1. Basic ra kayo ang exam, unsa dili bright?! 1

2. Review What is Photosynthesis? 2

3. Respiration is one of the important processes in our body? So what is Respiration? What is anaerobic and aerobic respiration? 3

4. Objectives Differentiate aerobic from anaerobic respiration. Explain the major features and sequence the chemical events of cellular respiration. 4

5. Aerobic vs. Anaerobic

6. 1. Introduction Cellular Respiration 6

7. Cellular Respiration Cellular respiration is a set of metabolic reactions occurring inside the cells to convert biochemical energy obtained from the food (mostly glucose) into a chemical compound called adenosine triphosphate (ATP) The process can be conveniently divided into two categories based on the usage of oxygen, namely aerobic and anaerobic respiration. 7

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9. 2. Respiration Aerobic and Anaerobic 9

10. Aerobic Respiration  Aerobic respiration is the aerobic catabolism of nutrients to carbon dioxide, water, and energy, and involves an electron transport system in which molecular oxygen is the final electron acceptor. The Chemical Equation for Aerobic Respiration is given below: Glucose (C 6 H 12 O 6 )  + Oxygen 6(O 2 ) → Carbon-dioxide 6(CO 2 )  +  Water 6 (H 2 O) + Energy (ATP) 10

11. Aerobic Respiration  The 2900 kJ of energy is released during the process of breaking the glucose molecule and in turn, this energy is used to produce ATP – Adenosine Triphosphate molecules which are used by the system for various purposes. Aerobic Respiration have 4 different stages: Glycolysis Formation of acetyl coenzyme A Citric Acid Cycle Electron Transport Chain 11

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13. Aerobic Respiration Glycolysis It is the primary step of aerobic respiration is glycolysis and takes place within the cytosol of the cell. During the glycolysis process, the glucose molecules are splitting and separated into two ATP and two NADH molecules, which are later used in the process of aerobic respiration. 13

14. Aerobic Respiration Formation of Acetyl Coenzyme A The second step in aerobic respiration is the formation of acetyl coenzyme A. In this process, pyruvate is oxidized in the mitochondria and  2-carbon acetyl group is produced. The newly produced 2-carbon acetyl group binds with coenzyme A, producing acetyl coenzyme A. 14

15. Aerobic Respiration Citric Acid Cycle The third step in aerobic respiration is the citric acid cycle, which is also called the Krebs cycle. In this stage of Aerobic respiration, the oxaloacetate combines with the acetyl-coenzyme A and produces citric acid. The citric acid cycle undergoes a series of reactions and produces 2 molecules of carbon dioxide, 1 molecule of ATP, and reduced forms of NADH and FADH. 15

16. Aerobic Respiration Electron Transport Chain This is the last step in aerobic respiration. In this phase, the large amounts of ATP molecules are produced by transferring the electrons from NADH and FADH. A single molecule of glucose creates a total of 34 ATP molecules. 16

17. Anaerobic Respiration Anaerobic respiration is a type of  cellular respiration where respiration takes place in the absence of oxygen. The process is also called fermentation In the absence of oxygen, the glucose derived from food is broken down into alcohol and carbon dioxide along with the production of energy. Glucose → Alcohol + Carbon dioxide + Energy 17

18. Anaerobic Respiration Anaerobic respiration is also used by multi-cellular organisms, like us, as a temporary response to oxygen-less conditions. Heavy or intensive exercise such as running demands high energy. Limited supply of oxygen – body resort to anaerobic respiration to fulfil the energy demand. Muscle Cramps? Blame anaerobic respiration. Partial breakdown of glucose, due to lack of oxygen, produces lactic acid and the accumulation of lactic acid causes muscle cramps. Glucose → Lactic acid + Energy 18

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20. Act. 1 Difference of Aerobic to Anaerobic 20

21. Activity 1 By pair, try to make table listing the differences between Aerobic and Anaerobic Respiration. Write your answer in a yellow paper. Rubrics: content 10, coherence - 10 21

22. 3. Respiration Difference between aerobic and anaerobic 22

23. Difference The primary difference between aerobic and anaerobic respiration is the presence or absence of oxygen during the processes However, it is a misconception that humans and other multicellular organisms use only aerobic respiration. This is disproven by the fact that our muscles, during vigorous exercises, undergo anaerobic respiration, where lactic acid is produced as the waste byproduct instead of carbon dioxide. 23

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25. Application 25

26. Research Using internet, try to research the other uses of anaerobic respirations. What products does this kind of respiration produce? 26

27. Summary 27

28. What did you learn in our lesson today. Use the format “I heard”, “I learned”, “I conclude” 28

29. Assessment 29

30. 1 A respiration with oxygen? 30

31. 2 A respiration without oxygen? 31

32. 3 Write the chemical equation of aerobic respiration 32

33. 4 Write the chemical equation of anaerobic respiration 33

34. 5 Accumulation of what compound can cause cramps? 34

35. Thanks! Any questions? 35