1. Cell Processes & Energy Respiration Chapter 2 Section 2

2. Respiration Cells break down simple food molecules, such as glucose, and release the energy they contain –Requires oxygen, O 2

3. Respiration Equation C 6 H 12 O 6 + 6 O 2  6 CO 2 + 6 H 2 O + energy

4. Respiration (Step 1) Glucose is broken down into small molecules in the cytoplasm –Only a little bit of energy is released

5. Respiration (Step 2) The mitochondria break down the small molecules in the presence of oxygen, O 2 –Lots of energy is released!!!

6. Photosynthesis vs. Respiration Can be thought of as opposite processes

7. Fermentation Allows cells to break down sugars without oxygen –Produces either… Alcohol Lactic Acid

8. Alcoholic Fermentation When yeast breaks down sugars without oxygen –Beer –Wine Gives off Carbon dioxide, CO 2 –Produces bubbles

9. Lactic Acid Fermentation Produced by muscle cells when they do not have enough O 2 –100m sprint Sore, wobbly legs