1. 1 Review Why do all organisms need food Relate Cause and Effect Why do macromolecules differ in the amount of energy they contain 2 Apply Concepts How does the process of cellular respiration maintain homeostasis at the cellular level Use Analogies How is the chemical energy in glucose similar to money in a savings account

2. Ch 9 Cellular Respiration and Fermentation
9.1 Cellular Respiration: An Overview

3. Chemical Energy and Food
Why do you need food
It provides the chemical building blocks they need to grow and reproduce
It contains chemical energy that is released when its chemical bonds are broken.

4. Calorie
Amount of energy needed to raise the temperature of 1 gram of water by 1 degree Celsius
1000 calories = 1 kilocalorie, or Calorie.

5. Cellular Respiration
Series of chemical reactions that breaks down sugar and releases energy
Occurs in all living cells
Opposite of photosynthesis
Oxygen + Glucose  Carbon dioxide + Water + Energy
6 O2 + C6H12O6  6 CO2 + 6 H2O + Energy.

6. Cellular Respiration This occurs in animals AND plants
This is the process that whenever your body needs energy
In addition to sugar, fats and proteins may also be used.

7. Cellular Respiration release energy a little at a time Controlled
SIMILAR
DIFFERENT
Cellular Respiration release energy a little at a time
Controlled
Burn fuel
Produce heat
Produce H2O
Produce CO2
Produce energy

8. Stages of Cellular Respiration
Glycolysis
Krebs cycle
Electron Transport Chain (ETC).

9. Glycolysis Produces only a small amount of energy
Most energy (90%) remains in the chemical bonds.

10. Krebs Cycle
Produces only a small amount of energy.

11. Electron Transport Chain (ETC)
Produces the bulk of the energy
Uses oxygen.

12. Aerobic
Require oxygen
Krebb Cycle and ETC
Occurs in the mitochondria.

13. Anaerobic
Does not need oxygen
Glycolysis
Occurs in cytoplasm.

14. Photosynthesis and Cellular Respiration
Opposite processes
Photosynthesis “deposits” energy
Cellular respiration “withdraws” energy.