1. Chapter 9 Textbook Pages 220-239 Study Guide Pages 70-76
Cellular Respiration
Chapter 9
Textbook Pages
Study Guide Pages 70-76

2. Looking Ahead… Today: Begin Cellular Respiration
Tomorrow: Glycolysis/Fermentation
Friday: Open notes quiz
Short class (due to assembly)
Start work on Krebs cycle
Monday: No School
Tuesday: Finish Krebs cycle and electron transport
Wednesday:Compare/Contrast Photosynthesis and Cell Resp.
Thurs & Fri: You’ll have a sub.

3. Who/What needs food? People Animals Plants Bacteria Fungi
All living things

4. Energy comes from Sugars (or complex starches)…
One gram of sugar can produce 3811 calories of heat energy
1000 calories of heat energy = 1 kilocalorie (labeled as Calorie with a capital “C” on our food products)

5. Pulling Energy from Sugar
How do organisms get energy from sugar?
Cellular Respiration!
Occurs in the mitochondrion
Begins with glycolysis
Food is broken down in the presence of oxygen!

6. What is Cellular Respiration?
The process that releases energy by breaking down food molecules in the presence of oxygen
6O2 + C6H12O6  6CO2 + 6H2O + energy
Oxygen + glucose  carbon dioxide + water + energy

7. Steps of Cellular Respiration
Glycolysis (cytoplasm)
Krebs Cycle (mitochondria)
Electron Transport Chain (mitochondria)

8. Cell Resp.

10. Project…
Use the Handout to cut out the stages of Cellular Respiration.
Paste cycle on a piece of paper to put in your binder
Label cytoplasm and mitochondrion
Add arrows
Make it colorful and fun!

11. Daily Warm Up…
The three stages of cellular respiration, in order, are _________, ________, and __________.
The equation for cellular respiration is ___ + ___  _____ + _____ + ______
What are the reactants?
What are the products?
HOTS: Cellular respiration is called aerobic respiration because _________ must be present as the final acceptor of electrons.

12. HOTS Higher Order Thinking Skills
HOTS: Cellular respiration is called aerobic respiration because oxygen must be present as the final acceptor of electrons.
**When you’re doing aerobics, you breathe more rapidly, because you need more oxygen!!**

13. Glycolysis
Process in which one molecule of glucose is broken in half, producing 2 molecules of pyruvic acid

14. Using the jumper cables…
In order to get things going, 2 ATP molecules are used to “jump start” the glycolysis process
Once things get rolling…

15. Making energy…
Glycolysis can produce 4 ATP molecules and 2 NADH molecules
NADH works just like NADPH… think of it as the prison transport van…
Each NAD+ can transport 2 high-energy electrons, or “prisoners” and one H+ ion, or “prison guard”

16. Faster than driving on the Autobahn…
Glycolysis moves super fast…
So fast, in fact, that the cell can produce thousands of ATP molecules in just a few miliseconds!

18. Fermentation
No oxygen around? Cells then rely on fermentation to release energy from food.
No oxygen = anaerobic
NADH is converted to NAD+ by giving the 2 electrons and H+ ion to the pyruvic acid

19. 2 Types of Fermentation:
Alcoholic fermentation
Yeast (bread)
Some microorganisms
Pyruvic acid + NADH  alcohol + CO2 + NAD+
Lactic acid fermentation
Why your muscles burn sometimes when you exercise
Pyruvic acid + NADH  lactic acid + NAD+