1. Chapter 4
Cell Activities

2. Chapter 4B
Cellular Respiration

3. II. Cellular Respiration
A. Organisms are placed into two categories based on how they obtain their energy.
1. Producers
2. Consumers

4. II. Cellular Respiration
1. Producers
2. Consumers
Organisms make their own source of energy
Examples include plants, algae, and some bacteria
Organisms obtain energy by eating other organisms
Examples include animals, humans, most bacteria, and fungi

5. The breakdown of an energy source to obtain usable energy for the cell
Cellular Respiration
The breakdown of an energy source to obtain usable energy for the cell

6. II. Cellular Respiration
B. The Process 1. Enzymes take apart sugars and release energy in small amounts in the form of ATP.

7. ATP
Adenosine
Tri-Phosphate
Actual energy currency for a cell

8. II. Cellular Respiration
B. The Process
2. Aerobic cellular respiration
a. most occurs in the mitochondria
b. Sugars are disassembled
c. ATP molecules are “recharged”

9. II. Cellular Respiration
B. The Process
2. Aerobic cellular respiration
d. Requires oxygen
e. Carbon dioxide is exhaled

10. Aerobic Cellular Respiration
reactants
sugar + oxygen
carbon dioxide + water + energy (ATP)

11. Aerobic Cellular Respiration
sugar + oxygen
products
carbon dioxide + water + energy (ATP)

12. 2. Aerobic Cellular Respiration

13. II. Cellular Respiration
B. The Process
3. Anaerobic cellular respiration
a) Performed without using oxygen

14. II. Cellular Respiration
B. The Process
3. Anaerobic cellular respiration
b) Two main types
* alcoholic fermentation
* lactic acid fermentation

15. Two main types of Anaerobic Cellular Respiration
Alcoholic fermentation
Lactic acid fermentation
Alcohol and carbon dioxide are the products
Example: Yeast in bread dough
Lactic acid and carbon dioxide are the products
Example: muscle cells when oxygen levels are low

16. 3. Anaerobic Cellular Respiration

17. Irreducible Complexity Revisited