1. Cellular Respiration

2. What is the purpose of cellular respiration? To get energy to all of your cells in a useable form I’m so happy—I have enough energy to do all my work!

3. Energy = the ability to do work What work do your cells need to do? I’m a ribosome. I’m working at making proteins. All day. 24/7. Whew!

4. I’m a lysosome. I’m hard at work digesting food and waste, breaking down worn out organelles. This is exhausting—think you could slow it down a little?

5. I’m Golgi. Too busy to talk— I’m popping out vesicles filled with products I have to send around the cell where they’re needed.

6. So everything a cell does is work. That means every cell in every living thing needs energy. So every cell does cellular respiration. Plant, animal, bacteria.

7. How does cellular respiration turn energy into a useable form? It’s a chemical reaction.

8. The reactants Glucose (sugar – fuel) You get it from the food you eat. It’s a carbohydrate—a molecule made from Carbon Hydrogen Oxygen

9. The reactants Burning the glucose fuel requires oxygen, O 2, the oxygen we breathe in.

10. The reactants So glucose + oxygen….

11. The products Glucose + Oxygen Energy! In a form called ATP

12. ATP is energy money GlucoseATP Packaging the energy into smaller units allows you to get maximum use out of each glucose. If our cells used glucose directly a lot would be wasted (as heat). Like paying $100 for a pack of gum and not getting change. X 100

13. Other products Waste products carbon dioxide + water

14. The whole reaction Glucose + oxygen carbon dioxide + water + energy (ATP) C 6 H 12 O 6 + 6O 2 6CO 2 + 6H 2 O + 38ATP

15. Takes place in the mitochondrion Power house of the cell

16. What if your cells can’t get enough oxygen? Fermentation –anaerobic process (without O 2 ) In yeast, fermentation makes alcohol

17. In humans, fermentation makes lactic acid That’s what makes your muscles hurt when you exercise a lot.

18. It’s all about ENERGY Why do we eat? To get fuel for making energy Why do we breathe? We need oxygen to make energy Why do we need energy? To do all the work that cells do every day, all day