7 EQUATION FOR CELLULAR RESPIRATION It'sPhotosynthesisBackwards!!!EQUATION FORCELLULAR RESPIRATION
8 Cellular Respiration… Process that releases energy by breaking down glucose & other food molecules in the presence of oxygenThree Stages:GlycolysisKrebs CycleElectron Transport Chain
9 GLYCOLYSISBreaks down “Glucose” (6-carbon sugar) into molecules of “Pyruvic Acid” (3-carbon compound)The products are:2 Pyruvic Acid molecules2 ATP molecules2 NADH molecules
10 Glycolysis has 2 pathways… If Oxygen is present (Aerobic) ...“Krebs Cycle”… then to Electron Transport ChainIf Oxygen is absent (Anaerobic) … “Fermentation”… (directly to Electron Transport Chain)
11 FERMENTATION (Aanerobic Pathway) 2 TYPES: Alcoholic & Lactic AcidAlcoholic :Yeast & other microorganisms use this to produce alcohol & CO2 as wastes.Beer is a beverage made by alcoholic fermentation
12 FERMENTATION (Aanerobic Pathway) Lactic Acid:Exercise causes the body needs more oxygen for respiration to make more ATPBody resorts to lactic acid fermentation to make ATPLactic Acid is also produced causing burning sensation in muscles
13 Glycolysis has 2 pathways… If Oxygen is present (Aerobic) ...“Krebs Cycle”… then to Electron Transport ChainIf Oxygen is absent (Anaerobic) … “Fermentation”… (directly to Electron Transport Chain)
14 KREBS CYCLE (Aerobic Pathway) Hans Kreb:SEE P.226Discovered citric acid cycle, “Krebs Cycle”Pyruvic Acid is broken down into CO2 in a series of energy extracting reactions
15 ELECTRON TRANSPORT CHAIN Uses high energy electrons from the Krebs Cycle to convert ADP to ATP!!!O2 is the final electron acceptor in the electron transport chain
16 Cellular Respiration… Process that releases energy by breaking down glucose & other food molecules in the presence of oxygenGlycolysis setsthe stage forCellular RespirationTwo Stages:Krebs CycleElectron Transport Chain
17 Cellular Respiration Mini-Lab Clear your desk (except for pencil or pen)Write the title above on notebook paperComplete the Mini-lab (procedures & observations)Answer the questions on both sidesTurn-in work to class basket when you finish(we will discuss it in class)You Have 15 min.!!!
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