1. Chapter 3: Energy Transformation
3.1 Obtaining Energy – Cellular Respiration

2. Cellular Respiration
Cellular respiration is the process that releases the energy from organic molecules and converts it to the usable form, ATP.

3. Mitochondria

4. The INPUTS of aerobic cellular respiration are the OUTPUTS of photosynthesis.
AND
The OUTPUTS of aerobic cellular respiration are the INPUTS of photosynthesis.

5. 6

6. Cellular Respiration – in all cells
Cellular respiration releases energy and produces carbon dioxide and water.

7. Moving CO2 OUT Cellular respiration in a mitochondria Lung Cell Blood
Gas exchange – simple diffusion
CO2
CO2
Blood
CO2
CO2
Cellular respiration in a mitochondria
CO2
Body Cell

8. Type of Cellular Respiration
WITH or WITHOUT Oxygen
Environment
Organisms
Type of Cellular Respiration
Oxygen-rich
Most eukaryotes
Aerobic respiration
Oxygen-free (anoxic)
Some microbes and yeasts
Anaerobic respiration or Fermentation

9. Aerobic Cellular Respiration
Aer- = air
Cellular respiration in the presence of oxygen.
Yields 36 molecules of ATP per 1 molecule of glucose

10. Overall Reaction for Aerobic Respiration
ATP 5 6 1 3 2 4 O C
ATP
Glucose + 6
Oxygen 6
Carbon dioxide + 6
Water

11. The reactants The products Glucose 6 5 1 4 Water 2 3 O C Oxygen
Carbon dioxide

12. The outcome – recharging cell batteries By generating energy to add phosphate to ADP
ADP/ATP
Cycle
Energy released
ADP
ATP
Energy input

13. STEP 1: Glycolysis Location: ATP Yield: Outputs:
2 pyruvate, 2 NADH, 2 ATP

14. BREAKING GLUCOSE
Glucose breakdown RELEASES chemical energy which allows ADP to join with an inorganic phosphate to form ATP.

15. X

16. STEP 2: Krebs Cycle (2 rounds)
Location:
ATP Yield:
Outputs:
2 CO2, 1 ATP, 3 NADH and 1 FADH2

18. STEP 3: Electron Transport Chain

19. Location:
ATP Yield:
Outputs:
32-34 ATP

20. Energy Tally Aerobic Cellular Respiration: Glycolysis 2 ATP
Krebs ATP
Electron Transport ATP
36-38 ATP