1. Bell Work
Respiration video on EDPUZZLE.COM – Due Wednesday before class
Pick up graphic organizer and fill in as a class

2. Opening Joke

3. Cellular Respiration
Mrs. Stewart

4. Standards:
CLE Distinguish between aerobic and anaerobic respiration.
CLE Investigate the relationship between the processes of photosynthesis and cellular respiration.

5. Objectives: Distinguish between Anaerobic and Aerobic Respiration
Summarize the major events of Glycolysis, Krebs Cycle and ETC
Summarize the reactants and products of aerobic cellular respiration

6. Shoulder Partners

7. Redox Reactions: Oxidation and Reduction
The transfer of electrons during chemical reactions releases energy stored in organic molecules
This released energy is ultimately used to synthesize ATP
Copyright © 2008 Pearson Education, Inc., publishing as Pearson Benjamin Cummings

8. The Principle of Redox
Chemical reactions that transfer electrons between reactants are called oxidation-reduction reactions, or redox reactions
In oxidation, a substance loses electrons, or is oxidized
In reduction, a substance gains electrons, or is reduced (the amount of positive charge is reduced)
Copyright © 2008 Pearson Education, Inc., publishing as Pearson Benjamin Cummings

9. becomes oxidized (loses electron) becomes reduced (gains electron)
Fig. 9-UN1
becomes oxidized
(loses electron)
becomes reduced
(gains electron)

10. Label the reaction below correctly:
Fig. 9-UN2
Label the reaction below correctly:
__________
__________

11. Oxidation of Organic Fuel Molecules During Cellular Respiration
During cellular respiration, the fuel (such as glucose) is oxidized, and O2 is reduced:
Copyright © 2008 Pearson Education, Inc., publishing as Pearson Benjamin Cummings

12. Where does the energy we need come from?

13. Comparing Photosynthesis & Cellular Respiration
Type
Anabolic
Catabolic
Energy
Light  Chemical
Chemical  ATP
Location
Chloroplasts
Mitochondria
Reactants
CO2 & H2O
C6H12O6 & O2
Products
CO2 & H2O
Equation
6CO2 + 6H2O --> C6H12O6 + 6O2
C6H12O6 + 6O2 --> 6CO2 + 6H2O

14. Organic molecules Cellular respiration in mitochondria
Fig. 9-2
Light
energy
ECOSYSTEM
Photosynthesis
in chloroplasts
Organic
molecules
CO2 + H2O
+ O2
Cellular respiration
in mitochondria
Figure 9.2 Energy flow and chemical recycling in ecosystems
ATP
ATP powers most cellular work
Heat
energy

15. Catabolic Pathways and Production of ATP
The breakdown of organic molecules is exergonic
Fermentation is a partial degradation of sugars that occurs without O2
Aerobic respiration consumes organic molecules and O2 and yields ATP
Anaerobic respiration is similar to aerobic respiration but consumes compounds other than O2
Copyright © 2008 Pearson Education, Inc., publishing as Pearson Benjamin Cummings

16. C6H12O6 + 6 O2  6 CO2 + 6 H2O + Energy (ATP + heat)
Cellular respiration includes both aerobic and anaerobic respiration but is often used to refer to aerobic respiration
Although carbohydrates, fats, and proteins are all consumed as fuel, it is helpful to trace cellular respiration with the sugar glucose:
C6H12O6 + 6 O2  6 CO2 + 6 H2O + Energy (ATP + heat)
Copyright © 2008 Pearson Education, Inc., publishing as Pearson Benjamin Cummings

17. Occurs in two main stages: Anaerobic vs. Aerobic
No oxygen
Makes a little energy
Occurs in Cytoplasm
Uses oxygen
Makes a lot of energy
Occurs in Mitochondria

19. Who can do cellular respiration?

20. Summary Equation for Aerobic Cellular Respiration
Where did these reactants come from?
Where will these products go? How will they be used?

21. Turtles
Tell your butterfly two ways that differentiate between photosynthesis and cellular respiration

22. Butterflies
Tell your turtle how photosynthesis and cellular respiration are similar and dependent on each other

23. What’s the purpose?
Purpose: To release energy from food molecules and make ATP!
Why do we need ATP?
To run chemical reactions that keep us alive and functioning.

24. Where did it all come from?
From Carbon Dioxide
H12
From Water O6

25. Hydrogen from Photosynthesis
The Hydrogen from photosynthesis holds high energy electrons that were energized in PS I
Cellular respiration releases those high energy electrons so that the energy can be captured and used to create ATP for the cell

26. Two possible pathways

27. Graphic Organizer of Events
GLUCOSE
Step 1: GLYCOLYSIS; (anaerobic)
2 - PYRUVATE
CO2
2 – ACETYL CoA
Step 2: KREBS CYCLE (aerobic)
CO2
Hydrogen
Step 3: ETC (aerobic – oxygen is final electron acceptor!)
ELECTRON TRANSPORT CHAIN
WATER

28. Turtles
Tell your butterfly the three phases of cellular respiration and which ones require oxygen