A Chap. 9Page 220C6H12O6 + 6O2 6CO2 + 6H2O + ATP
Where does it happen?MitochondriaHow does it happen?3 Steps . . .
3. The ELECTRON TRANSPORT CHAIN (ETC)1. GLYCOLYSIS2. The KREBS CYCLE!
1. Glycolysis--Takes place in the cytoplasm of cells--Breaks glucose (6-carbon) into two smaller compounds of Pyruvic Acid (3-carbon) and produces 2 ATP2 pyruvic acid molecules1 glucose
2. The Krebs CycleIf OXYGEN is present (aerobic) . . .then . . .--Takes place in mitochondria matrix--In this cycle, 3-carbon compound (pyruvic acid) and Oxygen are converted to CO2 , 2 ATP, and lots of high energy electrons
Image taken from www.sp.uconn.edu
3. Electron Transport ChainTakes place in inner membrane of mitochondriaHigh Energy electrons (from Krebs) are passed through a chain producing LOTS + LOTS + LOTS + LOTS of ATP (34)
What if after glycolysis, there is NO oxygen????Anaerobic conditions lead to . . .Fermentation1. Alcoholic2. Lactic Acid***No more ATP produced after glycolysis
SummaryGlucoseGlycolysisPyruvateFermentationEthanol & CO2LactateWithout O2With O2Krebs CycleETC(Net)2 ATP2 ATP34 ATP(Produces the greatest amount of ATP!)(Cells make a limited # of ATP)Alcoholic
Summary
SummarizingCellular RespirationC6H12O6 + 6O2 6CO2 + 6H2O + ATP
Photosynthesis and Cellular Respiration CycleProducts of one become reactants of the other!
Comparison of Photosynthesis vs. Cellular Respiration
PhotosynthesisCellular RespirationFunctionSunlight and Make GlucoseGlucose into EnergyLocationChloroplastMitochondriaCell TypePlant Cells, algaeALL Eukaryotes, some prokaryotesProcessesthat occurLight Reactions
Calvin Cycle- (Dark Reactions)Glycolysis or GlycolysisKrebs Cycle Fermentation ETCEquation6CO2 +6H2O C6H12O6 +6O2C6H12O6 +6O2 6CO2 +6H2O
How much energy do we make?In Cellular RespirationAnaerobicGlycolysis- 2 ATPFermentation- 0 ATPTotal- 2ATPAerobic Glycolysis- 2 ATPKrebs Cycle- 2 ATPETC- 34 ATP Total- 38 ATP
How do WE use Cellular Respiration?Quick EnergyEnough ATP to last about 50 meters in a race.Lactic- Acid Fermentation takes over to produce energyProduce energy for about 90 seconds.Long-Term EnergyExercise longer than 90 secondsExtra energy stored as carbohydrate glycogen for 15-20 minutes of energyLonger exercise body breaks down other stored molecules- mainly lipids.
VIDEO of CELLULAR RESPIRATIONhttp://www.youtube.com/watch?v=fvgpf51ScuI