1 / 18

Cellular Respiration

Cellular Respiration. Cellular Respiration is the process that releases energy by breaking down food molecules in the presence of oxygen. These reactions proceed the same way in plants and animals. 6O 2 + C 6 H 12 O 6  6CO 2 + 6H 2 O + Energy

elysia
Download Presentation

Cellular Respiration

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Cellular Respiration • Cellular Respiration is the process that releases energy by breaking down food molecules in the presence of oxygen. • These reactions proceed the same way in plants and animals. • 6O2 + C6H12O6 6CO2 + 6H2O + Energy • Oxygen + Glucose  Carbon Dioxide + Water + Energy

  2. Chemical Pathways Section 9-1 Glucose Electrontransport Krebs cycle Glycolysis Alcohol or lactic acid Fermentation (without oxygen)

  3.  Cellular Respiration: An Overview Section 9-1 Mitochondrion Electrons carried in NADH Electrons carried in NADH and FADH2 Pyruvic acid Glucose Electron Transport Chain Krebs Cycle Glycolysis Mitochondrion Cytoplasm

  4. Glycolysis • Glycolysis is the process in which one molecule of glucose is broken in half, producing two molecules of pyruvic acid. • 2 ATP needed to start reaction, 4 ATP are produced thus the net gain is 2 ATP.

  5. Glycolysis Section 9-1 Glucose 2 Pyruvic acid To the electron transport chain

  6. Fermentation • Releases energy from glucose without the presence of oxygen. • There are two types of fermentation: alcoholic and lactic acid. • Alcoholic fermentation is done by yeasts and some microorganisms. It produces alcohol & Carbon Dioxide • Lactic Acid is produced by muscles during rapid exercise when the body cannot supply enough oxygen.

  7. Anaerobic Cellular Respiration • Some organisms thrive in environments with little or no oxygen • Marshes, bogs, gut of animals, sewage treatment ponds • No oxygen used= ‘an’aerobic • Results in no more ATP, final steps in these pathways serve ONLY to regenerate NAD+ so it can return to pick up more electrons and hydrogens in glycolysis. • End products such as ethanol and CO2 (single cell fungi (yeast) in beer/bread) or lactic acid (muscle cells)

  8. Lactic Acid Fermentation Section 9-1 Glucose Lactic acid Pyruvic acid

  9. Aerobic Cellular Respiration • Oxygen required=aerobic • 2 more sets of reactions which occur in a specialized structure within the cell called the mitochondria • 1. Kreb’s Cycle • 2. Electron Transport Chain

  10. Aerobic Cellular Respiration Section 9-2 Glucose(C6H1206) + Oxygen(02) Glycolysis KrebsCycle ElectronTransportChain Carbon Dioxide (CO2) + Water (H2O)

  11. The Krebs Cycle • During the Krebs Cycle, pyruvic acid is broken down into carbon dioxide in a series of energy-extracting reactions. • Citric Acid is created in this cycle thus giving it the nickname Citric Acid cycle. • Net ATP Production is 2 ATP.

  12. The Krebs Cycle Section 9-2 Citric Acid Production Mitochondrion

  13. Electron Transport Chain • The electron transport chain uses the high-energy electrons from the Krebs Cycle to convert ADP to ATP. • Total ATP 32.

  14.  Electron Transport Chain Section 9-2 Electron Transport Hydrogen Ion Movement Channel Mitochondrion Intermembrane Space ATP synthase Inner Membrane Matrix ATP Production

  15. Energy Tally • 36 ATP for aerobic vs. 2 ATP for anaerobic • Glycolysis 2 ATP • Kreb’s 2 ATP • Electron Transport 32 ATP 36 ATP • Anaerobic organisms can’t be too energetic but are important for global recycling of carbon

  16. Energy & Exercise • Quick energy – Lactic Acid fermentation is used to get quick energy and gives off lactic acid as a by product, thus the muscle pain. • Long-Term Energy – Use cellular respiration to produce energy. Exercising or activities that last for at least 15 to 20 minutes. Best form for weight control.

  17. Comparing Photosynthesis & Respiration

More Related