1. The Cell in Action
Cell Energy

2. All cells need energy to carry out cell functions.
Cell Energy
All cells need energy to carry out cell functions.
Cells obtain and process energy in different ways.
Most energy comes from the sun.

3. Photosynthesis What: food (sugar) making process
Who: plants, algae, and some bacteria
When: presence of sunlight
Where: chloroplast (chlorophyll)
How:
6CO2 + 6H2O + light energy C6H12O6 + 6O2
Carbon Water Glucose Oxygen
Dioxide

4. Cellular Respiration What: release energy (ATP) from food
Who: animals, plants, algae, and some bacteria
When: presence of oxygen
Where: mitochondrion
How:
C6H12O6 + 6O CO2 + 6H2O + energy (ATP)
Glucose Oxygen Carbon Water Dioxide

5. Fermentation What: release energy (ATP) from food
Who: animals, fungi and bacteria
When: absence of oxygen
Where: mitochondrion
How:
C6H12O CO2 + 2C3H6O3 + energy (ATP)
Glucose Carbon *Lactic Acid Dioxide
* Lactic Acid = muscle fatigue & burning sensation