Cellular respiration involves a series of chemical reactions that convert glucose into energy in the form of ATP. Glucose undergoes glycolysis to form pyruvic acid, which then enters the Krebs cycle in the mitochondria. Electrons are passed through the electron transport chain, releasing energy to produce ATP. Oxygen is the final electron acceptor in this process, with carbon dioxide and water as byproducts. This allows living cells to harness the energy stored in glucose and other nutrients to power their functions.

1. CELLULAR RESPIRATION MAKING ENERGY AVAILABLE FOR LIVING THINGS

2. Adenine Ribose 3 Phosphate groups Section 8-1 ATP Go to Section:

3. ADP ATP Energy Energy Adenosine diphosphate (ADP) + Phosphate Adenosine triphosphate (ATP) Partially charged battery Fully charged battery Section 8-1 Figure 8-3 Comparison of ADP and ATP to a Battery Go to Section:

4. Chemical Pathways Glucose Glycolysis Krebs cycle Electron transport Fermentation (without oxygen) Alcohol or lactic acid Section 9-1 Go to Section:

6. Figure 9–2 Respiration: An Overview Glucose Glycolysis Cytoplasm Pyruvic acid Electrons carried in NADH Krebs Cycle Electrons carried in NADH and FADH 2 Electron Transport Chain Mitochondrion Mitochondrion Section 9-1 Go to Section:

7. Figure 9–3 Glycolysis Glucose To the electron transport chain Section 9-1 Go to Section: 2 Pyruvic acid

8. Figure 9–4 Lactic Acid Fermentation Glucose Pyruvic acid Lactic acid Section 9-1 Go to Section:

9. Flowchart Section 9-2 Glucose (C 6 H 12 0 6 ) + Oxygen (0 2 ) Glycolysis Krebs Cycle Electron Transport Chain Carbon Dioxide (CO 2 ) + Water (H 2 O) Go to Section: Cellular Respiration

10. Figure 9–6 The Krebs Cycle Citric Acid Production Section 9-2 Go to Section: Mitochondrion

11. Figure 9–7 Electron Transport Chain Section 9-2 Electron Transport Hydrogen Ion Movement ATP Production ATP synthase Channel Inner Membrane Matrix Intermembrane Space Go to Section: Mitochondrion