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Cellular Respiration

Cellular respiration releases energy by breaking down organic compounds with oxygen, producing ATP. Glycolysis and Krebs Cycle are key steps, leading to the Electron Transport Chain. This process yields ATP, CO2, and water, essential for all living organisms.

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Cellular Respiration

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Presentation Transcript

  1. Cellular Respiration 6O2 + C6H12O66CO2 + 6H2O + ATP

  2. Cellular Respiration • Processes that releases energy by breaking down organic compounds in the presence of oxygen • The energy released is ATP

  3. Glycolysis • First step (pathway) in breaking down food • Glycolysis breaks glucose in 1/2 • C3H6O3 • This molecule is called pyruvic acid • We get 2 ATPs during glycolysis • Glycolysis takes place in the cytoplasm of cells

  4. Glycolysis Pyruvic Acid Glucose Pyruvic Acid To the Electron Transport Chain

  5. Step 2 • Two options for the second step/pathway • If oxygen (aerobic) is present = Krebs Cycle Electron Transport Chain • In anaerobic conditions (no oxygen) = Fermentation

  6. Krebs Cycle & Electron Transport Chain • In aerobic conditions the pyruvic acid from glycolysis gets modified and transported to the mitochondria • Acetyl-Co Enzyme A • Mitochondria = power house

  7. Krebs Cycle • Modified Pyruvic acid goes through a five step process that produces some ATP, Carbon Dioxide, and electron holders • Electron holders are molecules that can hold electrons and move them to be used for other processes • FAD and NAD • FADH2 and NADH

  8. Electron Transport Chain • The electron holders from the Krebs cycle enter the E.T.C. • During this step water is produced and the most amount of energy =36 ATPs

  9. Figure 9–2 Cellular Respiration: An Overview Mitochondrion Electrons carried in NADH Electrons carried in NADH and FADH2 Pyruvic acid Glucose Electron Transport Chain Krebs Cycle Glycolysis Cytoplasm Mitochondrion

  10. Energy • Aerobic respiration gives 38 ATPs • Anaerobic respiration gives 2 ATPs • Cellular Respiration occurs in both plants and animals • Plants and animals need the energy to create macromolecules to keep cells alive.

  11. If NO OXYGEN IS PRESENT: Two Types of Fermentation • Alcoholic Fermentation • Yeast and other microorganisms • Produces carbon dioxide for bread, beer, and wine production • Lactic Acid Fermentation • Microorganisms  Produces yogurt and cheese • Muscle cells cramps and fatigue

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