1. Bell Ringer Why do we need to breathe?
Why do we breathe more when exercising?

2. Cellular respiration Cellular Respiration Two types
The process the body goes through to get ____________ out of the ________ we eat.
All living things perform some type of cellular respiration!!!
Cellular Respiration
If oxygen is NOT available
If oxygen is available
Two types

3. Aerobic Respiration – releasing energy using oxygen
Where does cellular respiration happen?
2. What are the reactants?
3. What are the products
What is made that we use?
5. Does aerobic cellular respiration happen
in plants, animals or both?
Overall equation
Identify each of the following as a requirement or an end
product of cellular respiration.
_______________________ Water (H2O)
_______________________ Carbon Dioxide (CO2)
_______________________ Glucose (C6H12O6)
_______________________ Oxygen (O2)
_______________________ Chemical Energy (ATP)

4. Glycolysis splits glucose in two.
Aerobic respiration happens in 3 stages: _____________ (no oxygen needed) 2. ______________ (oxygen needed) 3. _________________ (oxygen needed)
Where?
Stage 1 – Glycolysis
glyco lysis
glucose splitting
1 glucose
Chemical reaction
Glycolysis splits glucose in two.
___ ATP made
(4 made but 2 used)
AND electrons and H+ sent to step 3 on NADH
2 pyruvic acid

5. Stage 2 – ______________
This only happens when oxygen is present
The pyruvic acid made in glycolysis (stage1) still contains a lot of ________
In the Krebs cycle, pyruvic acid is broken down to release more energy
___________________ is given off as “waste”
Sends ____ and ____________________ to stage 3
(NADH and FADH2)

6. __________________ (we breathe out)
Stage 2 – Kreb cycle
pyruvic acid
Chemical reaction
___ATP made
__________________ (we breathe out)
____________ & __________ (go to ETC carrying H+ and excited electrons)

7. Stage 3 – _______________ (ETC)
This only happens when oxygen is present
___ and _________ __________ (on FADH2 and NADH) were “created” in the Krebs Cycle (stage 2) go to the electron transport chain.
In the electron transport chain, these excited electrons are used to make ___ ATP.
At the end of it all…these electrons are “caught” by the ____________ you breathe in.
This causes oxygen to become water

8. Aerobic Respiration (with oxygen)
STAGES 1 2 3
36% efficiency!! 

9. So all we eat is Glucose? NO!

10. Anaerobic Respiration (in animals)
anaerobic = in the absence of __________

11. In _____________ oxygen conditions or during heavy exercise, when not enough _________ can be supplied, muscle cells swap to anaerobic respiration (also called fermentation)

12. glucose glycolysis still happens as it does not require oxygen
Anaerobic Respiration
glucose
glycolysis still happens as it does not require oxygen
2 ADP + 2 P
2 ATP
pyruvic acid
_______ ______
_________

13. Cellular Respiration Aerobic vs. Anaerobic respiration
Is oxygen used?
Is glucose a requirement (substrate)?
Amount of energy released
Does it produce lactic acid?
(makes you sore!)
Produces alcohol and carbon dioxide (bread and wine)
Where in the cell does it happen?
Does it happen in animals?
Does is happen in plants?

14. Two types of anaerobic respiration
Lactic-Acid
Fermentation
Alcohol Fermentation
Does it use oxygen?
Is glucose a requirement (substrate)?
What organisms do it?
Where in the cell does this happen?
What does it make (give off)
Characteristics or uses of product