1. Cellular Respiration Chapter 4, sections 1 and 4-6

2. What Is ATP? Stands for adenosine triphosphate
Is the cell’s energy currency
Clip – 2:26

3. How Do We Get Energy From ATP?
By breaking the high-energy bonds between the phosphate groups

4. When is ATP Made in the Body?
During a process called cellular respiration that takes place in both plants & animals clip – 1:54

5. Cellular Respiration Includes pathways that require oxygen
So cellular respiration is often referred to as aerobic respiration
Breakdown of one glucose results in 36 to 38 ATP molecules
Animation (“The Big Picture”)

6. What are the Stages of Cellular Respiration?
Glycolysis
The Krebs Cycle
The Electron Transport Chain
Animation

7. Where Does Cellular Respiration Take Place?
It actually takes place in two parts of the cell:
Glycolysis occurs in the cytoplasm
Krebs Cycle & ETC occur in the mitochondria

8. Glycolysis Summary Takes place in the cytoplasm
Anaerobic (doesn’t use oxygen)
Requires input of 2 ATP; this is considered the energy-investment phase

9. With Oxygen….Or Without
If oxygen is present, the end product of glycolysis will go to mitochondrion for the rest of cellular respiration and produce LOTS of energy
If oxygen is not present, then the end product of glycolysis will enter fermentation
Muscle cells enter lactic acid fermentation
Yeast enters ethanol fermentation

10. With Oxygen – Krebs Cycle & Electron Transport Chain
CO2 is produced in the Krebs Cycle
2 ATP are also formed in the Krebs Cycle
Animation – go to “Krebs Cycle”
Electron Transport Chain
34 ATP produced in ETC
H2O is electron acceptor (you breathe this out)
Animation – go to “Electron Transport Chain”

11. Electron Transport Chain
Review of Cellular Respiration – 6:01