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CELLULAR RESPIRATION Chemical Pathways Chapter 9-1

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Presentation on theme: "CELLULAR RESPIRATION Chemical Pathways Chapter 9-1"— Presentation transcript:

1 CELLULAR RESPIRATION Chemical Pathways Chapter 9-1

2 In this chapter, we will learn how this glucose is ____________ by organisms and the _______ is stored as _______ in a process called ___________________ What kind of organisms do this? energy broken down ATP CELLULAR RESPIRATION

3 Area with gel-like material inside cell membrane surrounding mitochondria = ______________________ Power plant of cell that burns glucose and stores the energy as ATP = _______________ mitochondria CYTOPLASM Image from:

4 MITOCHONDRIA = cell power plant Surrounded by ___________ membrane Outer membrane & Inner membrane (called _______________ ) Space between inner membrane & outer membrane = ____________________ Space inside cristae folds = _________________ CYTOPLASM surrounds mitochondria INTERMEMBRANE SPACE DOUBLE MATRIX CRISTAE

5 All organisms (heterotrophs AND autotrophs) use the _____________ to charge up their _______ Image from: energy in food ATP

6 PHOTOSYNTHESIS ___________ + _________ + ___________ → _______________ + __________ 6 CO 2 6 H 2 OC 6 H 12 O 6 6O 2 _____________ + _________ → ________ + __________ + __________ ______________________________________________________________ CELLULAR RESPIRATION C 6 H 12 O 6 6O 2 6 CO 2 6 H 2 O The two equations are exact opposites!

7 ________ + _________ → ____________ Remember from Photosynthesis? High energy electron carrier = ___________ Cellular respiration uses some different carriers to transport high energy electrons. _______ & ________ NAD + FAD NAD + ________ + _________ → ____________ 2 e - + H + FAD NADP + 2 e - + 2H +

8 See glycolysis movie The first step in cellular respiration = __________________ Glycolysis happens in the ________________ outside the mitochondria GLYCOLYSIS CYTOPLASM

9 Glycolysis (GLYKOS = ________ LYSIS= ___________ ) Glycolysis ____________________________ BUT it needs some ____________to get it started. What molecule do you think is going to supply the energy do this? split apart DOES NOT REQUIRE OXYGEN ATP sweet ENERGY

10 ________ ↓ ___________ → → _____________ ↓ ____________________ + _______________ GLUCOSE2 PYRUVIC ACID PUT IN ________ and GET BACK __________ Net gain of ________ and __________ 2 ATP’s 4 ATP’s GLYCOLYSIS 2 ATP’s 2 NADH ATP ATP NADH

11 PYRUVIC ACID MOVES TO NEXT STEP IF THERE IS NO OXYGEN (______________) IF THERE IS OXYGEN (_____________) = ANAEROBIC = AEROBIC

12 PYRUVIC ACID ___________ OXYGEN 2 kinds of fermentation ___________________ & _____________________ ANAEROBIC Alcoholic Lactic acid WITHOUT

13 _______ + _____ → __________ + ______ + _____ ALCOHOLIC FERMENTATION PYRUVIC ACID ALCOHOL Happens when yeast makes bread dough rise CO 2 bubbles make _____________ in bread Alcohol _______________ during cooking CO 2 NAD + air spaces evaporates

14 _______ + _____ → ______________ + ________ LACTIC ACID FERMENTATION PYRUVIC ACID LACTIC ACID Happens in _____________ during ____________when body can’t get oxygen to tissues fast enough. Lactic acid builds up in muscles causing soreness NAD + exercise muscles

15 _______ + _____ → __________ + ______ + _____ FERMENTATION HAPPENS so cells can ____________________ needed to keep glycolysis going PYRUVIC ACID ALCOHOL → CO 2 NAD + REGENERATE the NAD + LACTIC ACID NAD + → You get the NAD + carriers back ______

16 REMEMBER: The “fork in the road” happens following glycolysis. The presence or absence of _______________ decides which path it takes next. OXYGEN

17 Flowchart Section 9-2 Glucose (C 6 H ) + Oxygen (0 2 ) Glycolysis Krebs Cycle Cellular Respiration We will next focus on the Krebs Cycle. This is the path that is taken when oxygen is present.

18 Image from BIOLOGY Miller and Levine; Prentice Hall Publishing _______________ follows glycolysis if oxygen is present KREBS CYCLE

19 REMEMBER: Glycolysis happens in the ________________ outside the mitochondria. Krebs cycle happens in _____________ inside the mitochondria CYTOPLASM MATRIX

20 KREBS CYCLE KREBS CYCLE PRODUCES ____

21 WHERE DOES IT GO? 6 carbons in original glucose are lost as ________________ to atmosphere → Carbon dioxide

22 WHERE DO THESE GO? ATP can be used directly to supply __________ for the cell. High energy electron carriers move into the ____________________ energy ELECTRON TRANSPORT CHAIN

23 Flowchart Section 9-2 Glucose (C 6 H ) + Oxygen (0 2 ) Glycolysis Krebs Cycle Electron Transport Chain Cellular Respiration We will next focus on the Electron Transport Chain.

24 WHERE DOES IT HAPPEN? Glycolysis KREBS ET Enzymes for ELECTRON TRANSPORT CHAIN are located in the ___________________________ Inner mitochondrial membrane (cristae)

25 ELECTRON TRANSPORT CHAIN Image from: BIOLOGY by Miller and Levine; Prentice Hall Publishing©2006 INTERMEMBRANE SPACE MATRIX CRISTAE

26 Electron Transport Chain AnimationElectron Transport Chain Animation- (select start, continue, and #1) Electron Transport Chain: High-energy _____________ from __________ and __________ are passed along the electron transport chain. Energy from passing electrons is used to transport _____________________ across the membrane. electrons NADH FADH 2 Hydrogen ions (H + )

27 The pumping of H + ions into the _______________________ represents potential energy that is harnessed to make ATP. As H + ions escape through ion channels back into the matrix, ________________ spins and adds a phosphate to ADP to form _______ Electron Transport Chain: INTERMEMBRANE SPACE ATP SYNTHASE ATP

28 Electron Transport Chain: ________________ serves as the final electron acceptor of the electron transport chain. At the end of the electron transport chain, an enzyme combines the electrons with the hydrogen ions and oxygen to form ______________ water (H 2 O) OXYGEN

29 SO: NADH → _____ FADH 2 → _____ 3 ATP’s 2 ATP’s

30 Glucose Glycolysis Cytoplasm Pyruvic acid Electrons carried in NADH Krebs Cycle Electrons carried in NADH and FADH 2 Electron Transport Chain Mitochondrion WHATS THE BIG PICTURE?

31 CELLULAR RESPIRATION includes: ______________________ _______________________ GLYCOLYSIS ELECTRON TRANSPORT CHAIN KREBS CYCLE

32 GLYCOLYSIS Happens in ______________ Breaks down ____________ into ________________ Produces _______ __________ 2 CYTOPLASM outside mitochondria 1 glucose 2 2 pyruvic acid (pyruvate)

33 KREBS CYCLE happens in ________________ Breaks down _________________ Produces: ____ ____ MATRIX inside mitochondria 2 pyruvic acid

34 ELECTRON TRANSPORT Enzymes found in _____________ Uses high energy electrons and H + ions donated by _______ and _______ Makes ___________ ________ acts a final electron acceptor to produce ________ cristae inner membrane of mitochondria NADH FADH 2 OXYGEN H 2 O 32 (net) ATP

35 Image from BIOLOGY Miller and Levine; Prentice Hall Publishing

36 CELLULAR RESPIRATION (aerobic/ with oxygen): 1 glucose → _______________ FERMENTATION (anaerobic/ without oxygen): 1 glucose → ________________ 36 ATP 2 ATP


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