1. Chapter 9:
CELLULAR RESPIRATION

2. What is cellular respiration?
The process that releases energy by breaking down glucose (sugar) and other food molecules in the presence of oxygen.
6O2 + C6H12O6  6CO2 + 6H20 + Energy

3. Two Types of Respiration
Anaerobic
Does NOT require oxygen
Aerobic
Does require oxygen
Both types begin with a process called glycolysis.

4. Glycolysis Takes place in the cytoplasm of the cell.
Process in which one molecule of glucose is broken in half, which produces two molecules of pyruvic acid.
CCCCCCCCCCCC
(glucose) CCC CCC (2 Pyruvic Acids)

5. Glycolysis Uses 2 ATP to begin 4 ATP molecules are produced
Has a net gain of 2 ATP molecules
-2 ATP
+4 ATP
2 ATP

6. Electron Transport Chain
Electrons carried in NADH
Mitochondrion
Pyruvic acid
Electrons carried in NADH and FADH2
Glucose
Electron Transport Chain
Glycolysis
Krebs Cycle
Mitochondrion
Cytoplasm

7. What happens after glycolysis?
Anaerobic Respiration
No oxygen
Goes through a process called fermentation
Aerobic Respiration
Oxygen Present
Goes through a process called the Krebs Cycle.

8. Krebs Cycle Takes place in the mitochondria
Process in which pyruvic acid is broken down into carbon dioxide in a series of energy-extraction reactions.
Begins with 2 ATP from glycolysis.
The cellular respiration process continues with the electron transport chain.

9. Electron Transport Chain
Electrons carried in NADH
Mitochondrion
Pyruvic acid
Electrons carried in NADH and FADH2
Glucose
Electron Transport Chain
Glycolysis
Krebs Cycle
Mitochondrion
Cytoplasm

10. Electron Transport Chain
Takes place in the mitochondria.
Uses high energy electrons from the Krebs cycle to convert ADP to ATP.
After the Krebs cycle and electron transport chain, a total of 36 ATP are produced.

11. Electron Transport Chain
Electrons carried in NADH
Mitochondrion
Pyruvic acid
Electrons carried in NADH and FADH2
Glucose
Electron Transport Chain
Glycolysis
Krebs Cycle
Mitochondrion
Cytoplasm

12. Fermentation
Releases energy from food molecules by producing ATP in the absence of oxygen.
Two Types:
Alcoholic Fermentation
Lactic Acid Fermentation
Starts with 2 ATP from glycolysis and ends with 2 ATP.

13. Electron Transport Chain
Electrons carried in NADH
Mitochondrion
Pyruvic acid
Electrons carried in NADH and FADH2
Glucose
Electron Transport Chain
Glycolysis
Krebs Cycle
Mitochondrion
Cytoplasm