Cellular respiration is the process by which organisms harvest chemical energy from food to produce ATP in mitochondria using oxygen. Glucose and oxygen are broken down to produce carbon dioxide, water, and energy in the form of ATP. Mitochondria contain enzymes and oxygen that allow them to act as the "furnace" to make ATP from fuels like carbohydrates and fats. If oxygen is missing, fermentation can partially generate ATP from glucose through processes like alcohol or lactic acid fermentation.

1. Cellular Respiration Harvesting Chemical Energy 2007-2008 ATP

4. 2007-2008 ATP What is energy in biology? Whoa ! HOT stuff ! Adenosine Tri Phosphate

7. Mitochondria are everywhere!! animal cells plant cells

8. “ Burn fuels” to make energy combustion making heat energy by burning fuels in one step CO 2 + H 2 O + ATP (+ heat ) respiration making ATP energy (& some heat) by burning fuels in many small steps CO 2 + H 2 O + heat fuel (carbohydrates) O 2 ATP food (carbohydrates) O 2

10. A Body’s Energy Budget eat food synthesis (building) storage ATP • resting energy (base level) • activity • temperature control { • growth • reproduction • repair { • glycogen (animal starch) • fat {

12. 2007-2008 Got the energy… Ask Questions !!