1. Section 3 Getting Energy to Make ATP
Chapter 9
Section 3
Getting Energy to Make ATP

2. Cellular Respiration
In Cellular Respiration, mitochondria break down food molecules to form ATP.
Two stages:
Aerobic (uses oxygen)
Anaerobic (does not use oxygen)

3. Aerobic Cellular Respiration
3. The general equation is:
Glucose + oxygen  water + carbon dioxide ATP
C6H12O6 + 6O2  6H2O + 6 CO2 + ATP

4. 4. Three Steps of Cellular Respiration
Glycolysis
Citric Acid Cycle (Krebs)
Electron Transport Chain

5. Glycolysis Glycolysis takes place in the (5) cytoplasm.
(6) glucose is used (broken down).

6. Glycolysis (7) pyruvic acid and 2 ATPs are produced.in glycolysis.
(8) Oxygen is not required.

7. Aerobic Respiration
After glycolysis, pyruvic acid enters (9) the mitochondria where most of aerobic cellular respiration takes place.

9. 10. What are the products of aerobic respiration?
Carbon dioxide, water, and
36 ATP

10. Fermentation
11. Fermentation occurs after glycolysis when cells are without oxygen.
This is also known as anaerobic respiration.
This takes place in the cytoplasm.

11. Two types of Fermentation
12. Lactic Acid Fermentation
Alcoholic Fermentation

12. Lactic Acid Fermentation
When you exercise heavily and your cells need more oxygen than you are breathing in for aerobic respiration to take place, Lactic acid fermentation (anaerobic respiration) takes place. Lactic acid builds up in muscles causing (13) muscle fatigue. (muscle tiredness). Your muscles are sore.

13. 14. What types of organisms produce lactic acid?
Animal cells when there is not enough oxygen for the complete breakdown of glucose
Bacteria

14. Alcoholic Fermentation
(15) This type of fermentation takes place in yeast and some bacteria.

15. Alcoholic Fermentation
16. After glycolysis, CO2 and ethanol are produced

16. Alcoholic Fermentation
17. When baking bread, yeast form tiny CO2 bubbles that cause the bread to rise as it cooks. The alcohol is baked out.

17. Other uses of alcoholic fermentation:
17. Making wine and beer (the ethanol is used and the carbon dioxide is released to the atmosphere or used for carbonation)

18. THE END