Cellular Respiration Breaking down food to get energy

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  • Cellular RespirationBreaking down food to get energy

  • 2 Basic Kinds of Respiration:AerobicUses O2 to break down foodProduces 38 ATP

    AnaerobicTakes place without oxygenProduces 2 ATP

  • GlycolysisBoth types of respiration begin with glycolysis in the cytoplasm of the cell

    Glucose, a molecule with 6 carbons, is split into 2 molecules each with 3 carbons called pyruvate

    Energy is released:2 ATP2 NADH

  • If oxygen is present in cellThe next step of aerobic respiration occurs The Krebs CyclePyruvate enters the mitochondriaIn a series of steps pyruvate is broken down into:6 CO2 molecules are released2 ATP are madeElectron carriers are made 3 NADH1 FADH2

  • The final step of aerobic respiration is the Electron Transport ChainETC requires oxygen to work

    The electron carrier molecules (NADH and FADH2) made in glycolysis and Krebs cycle are used to power the production of ATPUp to 34 ATPs can be made

    Water is made as a byproduct

  • Summing up Aerobic Respiration:Food, usually glucose, is broken down to make energy (ATP)1 glucose molecule = up to 38 ATP moleculesOxygen is needed

    C6H12O6 + 6 O2 6 CO2 + 6 H2O + ATP + Heat

  • If no oxygen is presentSome cells go through anaerobic respiration aka fermentationSince oxygen is required for the Krebs Cycle and for the Electron Transport Chain, the only part of cellular respiration that works without oxygen is glycosis which only produces a little ATP

  • Lactic Acid FermentationOccurs in muscle cellsTurn pyruvate into lactic acid when they run out of oxygenLactic acid causes fatigue and crampingAlcoholic Fermentation Occurs in yeastTurn pyruvate into alcoholBreathe out CO2 makes bread rise

    Examples of Fermentation: