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Cellular Respiration

Cellular Respiration. Releasing the Energy from our food!. Concept Review. First Law of Thermodynamics Covalent bond – H atom Redox reactions NAD/NADH. NAD (empty)  NADH. NAD (ox)  NADH (red). Nitrogenous Base = Adenine. Phosphate groups. Contain a lot of potential energy.

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Cellular Respiration

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  1. Cellular Respiration Releasing the Energy from our food!

  2. Concept Review • First Law of Thermodynamics • Covalent bond – • H atom • Redox reactions • NAD/NADH

  3. NAD (empty)  NADH

  4. NAD (ox)  NADH (red)

  5. Nitrogenous Base = Adenine Phosphate groups Contain a lot of potential energy Pentose Sugar = Ribose Adenosine Tri-Phosphate

  6. Hydrolysis of ATP

  7. Why to we need food? • Answer:

  8. Understanding Check • QUESTION:What process do we (and all eukaryotes) use to extract the stored (chemical) energy of food and rebuild molecules of ATP? • Answer:CELLULAR RESPIRATION

  9. Overall Equation for Cellular Respiration? Glucose is oxidized Oxygen is reduced C6H12O6+ 6 O2 6 CO2+ 6 H2O + Energy

  10. Cellular Respiration is Three Metabolic Pathways

  11. Glycolysis

  12. Understanding Check • How many ATPs were “invested” in glycolysis? • How many ATPs were produced? (total) • How many ATPs were produced? (net/ “profit”)

  13. Understanding Check • Was any other energy extracted from glucose? (Explain) • Where are NADHs “cashed in” for ATPs?(Note: The Energy stored in each NADH is enough to regenerate ~ 3 ATPs) • The ETC only operates in the presence of __________?

  14. Synopsis of Glycolysis:

  15. Part II: Kreb Cycle • What is the purpose of the Kreb Cycle? • Where does the Kreb Cycle (aka Citric Acid Cycle aka TCA cycle) occur?

  16. Mitochondrion!

  17. KrebCycle

  18. KrebCycle

  19. Understanding Check • True or False?Your body takes in oxygen gas (O2) and converts it to CO2? • How many ATPs are directly produced in the TCA? • Where else in the energy (formerly in glucose) being temporarily stored?

  20. Electron Transport Chain

  21. Pathwayof ElectronTransport

  22. A Class Demonstration • Yea!

  23. Understanding Check • Why do we need oxgyen to live? • True or False:We breathe in oxygen and convert it to carbon dioxide? • How does cyanide kill you? • Why do you feel SOOO tired when you are running a fever?

  24. More on the “Magic” • But first, let’s talk about micro-brewing…….

  25. For Tomorrow…. • Study for QUIZ on Cellular Respiration • Finish Reading CH 9 • Run Cell Respiration Mentor(Linked to MED’s website) • Good Luck!

  26. Explaining the “Magic”

  27. Creating a Proton Gradient

  28. Using the Proton Gradient

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