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Cellular Respiration (8.3)

Cellular Respiration (8.3). State Standard SB3A. Explain the cycling of energy through the processes of photosynthesis and respiration. Cellular Energy. Chapter 8. 8.3 Cellular Respiration. Overview. Organisms obtain energy in a process called cellular respiration.

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Cellular Respiration (8.3)

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  1. Cellular Respiration (8.3) State Standard SB3A. Explain the cycling of energy through the processes of photosynthesis and respiration.

  2. Cellular Energy Chapter 8 8.3 Cellular Respiration Overview • Organisms obtain energy in a process called cellular respiration. • The equation for cellular respiration is the opposite of the equation for photosynthesis. • Label the reactants & products below.

  3. Cellular Energy Chapter 8 8.3 Cellular Respiration Overview Cont’d • Cellular respiration occurs in 3 parts. • Glycolysis • Krebs Cycle • Electron Transport Chain (Together, the KC & ETC make up Aerobic Respiration)

  4. Cellular Energy Chapter 8 8.3 Cellular Respiration Glycolysis • Takes place in the cytoplasm • Glucose is broken down • Anaerobic (without oxygen) • Glucose enters the cell by active transport • Enzymes break it down into pyruvate • Net result = 2 ATP • Precedes aerobic respiration

  5. Cellular Energy Chapter 8 8.3 Cellular Respiration Aerobic Respiration: Krebs Cycle Purpose: Breaks down the pyruvate from glycolysis to produce molecules used in the electron transport chain. Location:Mitochondria Products:6 CO2 2 ATP 8 NADH 2 FADH2

  6. Cellular Energy Chapter 8 8.3 Cellular Respiration Aerobic Respiration: Krebs Cycle Cont’d • What happens to the products? 6 CO2 – gets released (by-product) 2 ATP – used for energy-requiring processes 8 NADH & 2 FADH2 – move on to help generate ATP in the next step

  7. Cellular Energy Chapter 8 8.3 Cellular Respiration AR: Krebs Cycle Cont’d • Circle the parts of the diagram that help you recognize it as Krebs Cycle.

  8. Cellular Energy Chapter 8 8.3 Cellular Respiration AR: Electron Transport Chain (ETC) • Final step in the breakdown of glucose Purpose:Converts ADP to ATP by transferring electrons Location:Mitochondria Products: ATP (34) CO2 H2O

  9. Cellular Energy Chapter 8 8.3 Cellular Respiration Anaerobic Respiration • AKA fermentation • The anaerobic pathway that follows glycolysis • Occurs in the cytoplasm • Generates small amounts of ATP

  10. Cellular Energy Chapter 8 8.3 Cellular Respiration Anaerobic Respiration Cont’d • 2 main types • Lactic acid fermentation -muscles cells -microorganisms used to produce foods such as cheese, yogurt, & sour cream • Alcohol fermentation -yeast -some bacteria

  11. A B C D Cellular Energy Chapter 8 CDQ 2 Chapter Diagnostic Questions In which metabolic process are molecules broken down to produce carbon dioxide and water? photosynthesis cellular respiration homeostasis fermentation

  12. A B C D Cellular Energy Chapter 8 FQ 3 8.1 Formative Questions Why is cellular respiration a catabolic pathway? Energy is used to form glucose and oxygen. Energy is converted from water to carbon dioxide. Energy that is lost is converted to thermal energy. Energy is released by the breakdown of molecules.

  13. A B C D Cellular Energy Chapter 8 FQ 9 8.3 Formative Questions What is the overall purpose of cellular respiration? to make ATP to process H2O to store glucose to deliver oxygen

  14. A B C D Cellular Energy Chapter 8 FQ 10 8.3 Formative Questions Which represents the general sequence of cellular respiration? TCA cycle  chemiosmosis  glycolysis glycolysis  Krebs cycle  electron transport electron absorption  catalysis  phosphorylation aerobic pathway  anaerobic pathway  fermentation

  15. A B C Cellular Energy Chapter 8 FQ 11 8.3 Formative Questions Which stage of cellular respiration is the anaerobic process? glycolysis Krebs cycle electron transport

  16. A B C D Cellular Energy Chapter 8 FQ 12 8.3 Formative Questions Which molecule generated by the Krebs cycle is a waste product? CoA CO2 FADH2 NADH

  17. A B C D Cellular Energy Chapter 8 CAQ 2 Chapter Assessment Questions During the Krebs cycle, pyruvate is broken down into what compound? H2O O2 CO CO2

  18. A B C D Cellular Energy Chapter 8 STP 6 Standardized Test Practice What prevents pyruvate from entering the Krebs cycle and instead results in this pathway? a buildup of CO2 a lack of oxygen an excess of glucose an increased demand for ATP

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