1. Cell Respiration

2. Respiration Respiration
The process by which food molecules (glucose) are broken down by cells to release energy is called respiration.

3. Respiration Where does this take place? Mitochondria Cristae
Takes place in cells, more specifically mitochondria
The raw materials are glucose and oxygen (the products from photosynthesis)
Show them how formula is reversed. (You could make them tell you the products and reactants (raw materials))

4. glucose + O2 ---> CO2 +H2O + energy
Respiration
Equation of Respiration:
The chemical equation of respiration is:
glucose + O2 ---> CO2 +H2O + energy
products
reactants

5. Where do the reactants for respiration come from?
glucose + O2
The raw materials are glucose and oxygen (the products from photosynthesis)
Show them how formula is reversed. (You could make them tell you the products and reactants (raw materials))

6. Cellular Respiration Glucose (C6H12O6) ATP ATP Glycolysis H
Starts with glucose.
Make sure to explain that ATP is used to start reaction. Glucose is broken down in half, hydrogens are broken off (energy is produced) and glucose is turned into pyruvic acid.
The type of respiration that occurs depends on the presence of oxygen.
Pyruvic acid
Fermentation
No O2 present
Aerobic Respiration

7. Glycolysis Process of splitting glucose into pyruvate
2 ATP molecules and 2 pyruvates are produced
2 ATP
Glucose
Pyruvate

8. Aerobic vs Anerobic Aerobic Anaerobic Processes using oxygen
Processes without use of oxygen

9. Anaerobic Respiration
This is called fermentation.
Is oxygen present?
Fermentation
Alcohol Fermentation
EX: yeast
Ethyl alcohol + carbon dioxide
Lactic Acid Fermentation
Lactic acid produced
EX: muscles

10. If oxygen is absent... Anaerobic Respiration Lactic acid fermentation
No ATP produced
Lactic acid produced (makes muscles sore)
Alcoholic Fermentation
Makes beer, wine,
bread rise

11. Aerobic Respiration Glycolysis Is this with or without O2?
ATP
H2O
Is this with or without O2?
With oxygen.
Pyruvic acid goes into Kreb’s cycle.

12. If oxygen is present... Aerobic Respiration
Pyruvate Enters the mitochondria
Kreb’s Cycle
Pyruvate converted to 24 molecules of ATP
Electron Transport Chain
Produces 6 ATP using
electrons from glycolysis

13. Cycle of Energy in Life Glucose and O2 CO2 and H2O ATP
Process: Photosynthesis
Organism: Plant
Place Occurs: Chloroplast
Glucose and O2
CO2 and H2O
ATP
Process: Respiration
Organism: ALL
Place occurs: Mitochondria/
Cytoplasm
Cycle of Energy in Life

14. Reflection Questions
1. What molecule do animal cells get get there energy from?
2. What is happening during glycolysis?
3. Can more ATP be made in aerobic or anaerobic respiration?
4.Where does aerobic respiration take place?
5. Explain the difference between Aerobic and Anaerobic?