Hmmmm…

1. Hmmmm… • When a consumer eats what are they getting? • What do organisms use matter and energy for?(online 7.1 activity) • How is putting chemical energy to work in a cell different than in an auto? • How is the burning of a marshmallow different from eating the marshmallow? (online 7.2 activity) • How is cellular respiration different from digestion? • Cellular Respiration: The chemical process by which organisms use oxygen to convert the chemical energy stored in glucose into another form of chemical energy called ATP. • ATP is then used to do cellular work(transport, mechanical, or chemical work)

2. Chapter 7 Cellular Respiration • Balanced Chemical Equation: __________________________________ • Reactants are: ____________________ • Products are: _____________________ • Three stages are: 1. 2. 3.

3. Stage 1: Glycolysis • Does not require ___________ • Occurs in _____________________ of cell • Net gain of ______________

4. Stage 2: Kreb’s Cycle Cytoplasm Mitochondria Conversion of two pyruvic acid molecules to two acetyl CoA molecules yields: ___ CO2 and ___ NADH

5. Kreb’s Cycle Yield per acetyl CoA • ___ carbon atoms added from acetyl CoA • ___ carbon atoms removed as ______ • ___ NAD+ converted to _____ NADH • ___ FAD converted to ____ FADH2 • ___ ADP converted to ___ ATP X 2 for each acetyl CoA is a result of ___ NADH, ___ FADH2, and ___ ATP

6. Stage 3: ETC and ATP Synthase

7. ETC and ATP Synthase • Electrons from NADH and FADH2 pass along ETC (series of molecules) • Some energy from electrons used to power pump that moves H+ out of inner mitochondria membrane (active transport) • Oxygen accepts pair of electrons at end of ETC, combines with 2H+, creating water • H+ diffuse (passive transport) through ATP synthase into mitochondria • ATP synthase generates ATP, ADP + P  ATP **How many ATP molecules are made from one glucose molecule?

8. ATP Production per Molecule of Glucose Glucose 2 G3P Gross ___ ATP Net ___ ATP ~63% of energy in glucose molecule lost as heat