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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 Releasing the Energy from our food!
Concept Review • First Law of Thermodynamics • Covalent bond – • H atom • Redox reactions • NAD/NADH
Nitrogenous Base = Adenine Phosphate groups Contain a lot of potential energy Pentose Sugar = Ribose Adenosine Tri-Phosphate
Why to we need food? • Answer:
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
Overall Equation for Cellular Respiration? Glucose is oxidized Oxygen is reduced C6H12O6+ 6 O2 6 CO2+ 6 H2O + Energy
Understanding Check • How many ATPs were “invested” in glycolysis? • How many ATPs were produced? (total) • How many ATPs were produced? (net/ “profit”)
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 __________?
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?
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?
A Class Demonstration • Yea!
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?
More on the “Magic” • But first, let’s talk about micro-brewing…….
For Tomorrow…. • Study for QUIZ on Cellular Respiration • Finish Reading CH 9 • Run Cell Respiration Mentor(Linked to MED’s website) • Good Luck!