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
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
