1. Ch 9 Cellular Respiration

2. 9-1 Chemical Pathways
calorie- the amount of energy needed to raise the temperature of 1 gram of water 1 degree Celsius.

3. 9-1 Chemical Pathways
Cellular respiration- process that releases energy by breaking down glucose and other food molecules in the presence of oxygen.

4. 9-1 Chemical Pathways
Glycolysis- the first process in cellular respiration that releases a small amount of energy in the food we eat.

5. 9-1 Chemical Pathways
During glycolysis, one 6-carbon sugar molecule is split into two 3-carbon molecules.
NAD+- an electron carrier. Carries two high energy electrons as NADH.

6. 9-1 Chemical Pathways Fermentation- occurs when oxygen is not present.
Anaerobic- without oxygen.
Main types of fermentation:
1) lactic acid
2) alcoholic

7. 9-2 The Krebs Cycle and Electron Transport
Aerobic- requires oxygen.
Krebs cycle- the 3-carbon molecule formed during glycolysis is broken down into three carbon dioxide molecules, releasing more energy.

8. 9-2 The Krebs Cycle and Electron Transport
Electron transport chain- uses high-energy electrons from the Krebs cycle to “charge” ADP into ATP.

9. 9-2 The Krebs Cycle and Electron Transport