1. Ch 9 Cellular Respiration
Cell Energetics

2. 8.1 Where do living things get E?
Heterotrophs – must eat food to get the energy
You EAT!
Carbohydrate, Lipids, and Proteins ALL get broken down
HIGH E bonds in Carbs and Lipids
Autotrophs – make their own food using sunlight or other chemicals
Photosynthetic autotrophs make sugar from sunlight
How ever you get food you use it to make….
ATP (adinosine triphosphate) –

3. Cellular Respiration ATP
Releases ENERGY from the food you eat/make, IF OXYGEN is present
ATP

4. 8.3 What is Cellular Respiration?
The process of mitochondria (power station of the cell) to break down glucose (from food) to make ATP.
There are 3 stages:
Glycolysis
Krebs Cycle
Electron Transport
Chain (ETC)

5. 8.3 What is Glycolysis? Anaerobic Location: Cytoplasm
Reactant: Glucose
Product: 2ATP and 2 molecules of Pyruvic Acid
Advantge: it is quick!! No Oxygen needed directly

6. What is the KrebsCycle? Location: Mitochondria matrix
Reactant: Pyruvic Acids (Pyruvate)
Product: 2ATP NADH and FADH2 (electron carriers) and CO2
AKA – Citric Acid Cycle

7. What is the e- Transport Chain
Aerobic
Location: Inner Mito. membrane
Reactants: electrons from KC (NADH and FADH2 drop them off and Oxygen
Products: 32 ATP and water

8. Electron Transport Chain and Oxygen
Oxygen is the FINAL ELECTRON ACCEPTOR

9. What is fermentation? When NO oxygen is present….
Glycolysis still happens, but next step is FERMENTATION
Essentially makes enough E to run glycolysis
Lactic Acid Fermentation
Used by animal cells
Produces lactic acid and 2 ATP
Alcoholic Fermentation
Used by yeast and some bacteria
Produces CO2 and ethyl alcohol

10. Compare and Contrast Photosynthesis Food/Glucose made CO2 taken in
O2 given off
H20 broken down
Requires light
Occurs in cells with chlorophyll
Cellular Respiration