CELLULAR RESPIRATION How Cells Release Energy Aerobic Cellular Respiration 1. Glycolysis 4. Electron Transport System 3. Krebs Cycle Anaerobic Cellular

  • Published on
    14-Dec-2015

  • View
    214

  • Download
    2

Embed Size (px)

Transcript

  • Slide 1

Slide 2 CELLULAR RESPIRATION How Cells Release Energy Slide 3 Aerobic Cellular Respiration 1. Glycolysis 4. Electron Transport System 3. Krebs Cycle Anaerobic Cellular Respiration 1. Glycolysis 2. Fermentation Cellular Respiration Slide 4 Anaerobic Cellular Respiration 2. Fermentation 1. Glycolysis Slide 5 (Sugar Splitting) C 6 H 12 O 6 Glucose 2 NAD+2 NADH 2 ATP2 ADP Takes place in the cytoplasm of all cells Pyruvate Slide 6 2. Fermentation Alcoholic Fermentation Pyruvate AlcoholCO 2 2 NADH2 NAD+ The Significance of fermentation is to regenerate NAD+ from NADH for its continuous role in glycolysis + Slide 7 2. Fermentation Lactic Acid Fermentation Pyruvate 2 NADH2 NAD+ The Significance of fermentation is to regenerate NAD+ from NADH for its continuous role in glycolysis Lactic acid Slide 8 Fermentation does NOT produce additional ATP The Significance of fermentation is to regenerate NAD+ from NADH for its continuous role in glycolysis During anaerobic cellular respiration only 2 ATP are produced from one initial glucose molecule Slide 9 Aerobic Cellular Respiration 1. Glycolysis 4. Electron Transport System 3. Krebs Cycle 3. Krebs Cycle: Step a 3. Krebs Cycle: Step b Slide 10 1. Glycolysis (Sugar Splitting) C 6 H 12 O 6 Glucose 2 NAD+2 NADH 2 ATP2 ADP Takes place in the cytoplasm of all cells Pyruvate Slide 11 The output of Glycolysis is: 2 ATP 2 NADH Slide 12 The 2 pyruvates produced by glycolysis in the cytoplasm are transported into the mitochondrion to continue aerobic cellular respiration in Krebs cycle Slide 13 1 st pyruvate 1 CO2 Acetyl group + CoA Acetyl-CoA 3. Krebs Cycle Takes place in the mitochondrion Step a 1 NADH Slide 14 2 nd pyruvate 1 CO2 Acetyl group + CoA Acetyl-CoA 3. Krebs Cycle Takes place in the mitochondrion Step a 1 NADH Slide 15 The output of Krebs Cycle step a is: 2 CO2 2 NADH Slide 16 3. Krebs Cycle Step b 1 st Acetyl-CoA CoA + 4-C- compound 6-C-Compound 2 CO2 1 ATP 3 NADH 1 FADH2 Slide 17 3. Krebs Cycle Step b 2 nd Acetyl-CoA CoA + 4-C- compound 6-C-Compound 2 CO2 1 ATP 3 NADH 1 FADH2 Slide 18 The output of Krebs Cycle step b is: 2 ATP 4 CO2 6 NADH 2 FADH2 Slide 19 The output of Krebs Cycle both steps is: 2 ATP 6 CO2 8 NADH 2 FADH2 The output of Krebs Cycle step b is: 2 ATP 4 CO2 6 NADH 2 FADH2 The output of Krebs Cycle step a is: 2 CO2 2 NADH Slide 20 Summary of energy harvest GLYCOLYSIS 2 ATP 2 NADH Krebs Cycle: 2 ATP 6 CO2 8 NADH 2 FADH2 4 ATP can be used for cellular work 6 CO2 are released Raw materials for electron transport system: 10 NADH 2 FADH2 Slide 21 An Overview of the Electron Transport System Slide 22 Slide 23 The Electron Transport System 1. NADH and FADH2 pass electrons to the first protein in the electron transport system (ETS). 2. Electrons pass from energy carrier to the next. 3. With each transfer, energy is released 4. This energy is used to pump hydrogen ions into the outer compartment of the mitochondrion. Slide 24 5. Hydrogen ions build up in the outer compartment (higher concentration of H+ in the outer compartment than in the matrix). Slide 25 Slide 26 6. Hydrogen ions flow back across the membrane through an enzyme (ATP synthase) that synthesizes ATP 7. The last protein in the ETS finally passes electrons to oxygen along with hydrogen ions, generating water. Slide 27 The Electron Transport System Slide 28 Slide 29 Electron Transport System Most of ATP is produced during ETS ETS produces 32 ATP Slide 30 The Overall Equation of CR C 6 H 12 O 6 + 6 O 2 6 CO 2 + 6 H 2 O + 36 ATP + Heat