1. Cell Energy: Cellular Respiration

2. Cellular Respiration Definition: The process where stored energy is converted to a usable form. Oxygen and glucose are converted to carbon dioxide, water, and ATP.

3. Cellular Respiration Equation (Opposite of photosynthesis) O 2 + C 6 H 12 O 6  CO 2 + H 2 O + ATP (oxygen) + (glucose)  (carbon dioxide) + (water) + (energy) ReactantsProducts

4. Who performs cellular respiration? All organisms!!!

5. Why is cellular respiration important? Cellular respiration is the process organisms use to obtain energy from the food they eat. Cells use the energy from cellular respiration for growth, repair, and maintenance.

6. Processes involved Glycolysis Aerobic Respiration Kreb’s Cycle/Citric Acid Cycle Electron Transport Chain (ETC)

7. Glycolysis (“Glucose-Breaking”) Takes place in the cytoplasm The glucose molecule is broken into two pieces. Glucose is converted to pyruvic acid: this conversion produces 2 ATP molecules.

9. Aerobic Respiration “Aerobic” means “with oxygen” Oxygen is required for these processes to occur: it is the final acceptor of electrons 34 ATP are produced Krebs cycle (Citric Acid) & the electron transport chain (ETC)

10. Mitochondrion The “Powerhouse of the Cell” Aerobic respiration takes place in the mitochondrion. This is where most of the ATP is produced.

11. Cellular respiration is like a mirror image of photosynthesis. The Krebs cycle transfers energy to an electron transport chain. takes place in mitochondrial matrix breaks down three-carbon molecules from glycolysis –makes a small amount of ATP –releases carbon dioxide –transfers energy-carrying molecules 6H O 2 6CO 2 6O 2 mitochondrion matrix (area enclosed by inner membrane) inner membrane ATP energy energy from glycolysis 1 2 4 3 Krebs Cycle Pyruvic Acid ETC

12. 6H O 2 6CO 2 6O 2 mitochondrion matrix (area enclosed by inner membrane) inner membrane ATP energy energy from glycolysis 1 2 4 3

14. The Krebs Cycle/Citric Acid Cycle

15. 6H O 2 6CO 2 6O 2 mitochondrion matrix (area enclosed by inner membrane) inner membrane ATP energy energy from glycolysis 1 2 4 3 and The electron transport chain produces a large amount of ATP. –takes place in inner membrane –energy transferred to electron transport chain –oxygen enters process –ATP produced –water released as a waste product Electron Transport ETC

16. Electron Transport Chain

17. Cellular Respiration: Pathways Glycolysis Anaerobic Respiration (fermentation) Aerobic Respiration Glucose With oxygen Without oxygen 2 ATP No additional ATP 34 ATP

18. Cellular Respiration

19. Anaerobic Respiration Lactic Acid Fermentation Alcoholic Fermentation