1. Section 2-3: energy Essential Question
Is energy used or made in photosynthesis? Is energy used or made during cellular respiration?
Key-terms: Photosynthesis, chloroplast, sunlight, water, carbon dioxide, glucose, ATP, Cellular Respiration, food, mitochondria
Learning Target
Use the chemical equation for cellular respiration to explain how energy stored in food molecules provides energy to the cell.
Section 2-3: energy

2. Don’t forget to chunk your notes!

3. SUNLIGHT IS THE MAIN SOURCE OF ENERGY FOR LIFE ON EARTH

4. ALL ENERGY comes from the ____ .
sun
sun

5. There are 3 types of energy:
Heat
_______
Chemical
Light
light

6. Food stores _________ energy
chemical
chemical

7. energy
Food is not a usable form of ___________ energy in cells
It must be converted to a usable form
chemical

8. Don’t forget to chunk your notes!

9. ATP Food is changed into Adenosine TriPhosphate
(ATP): chemical fuel that powers cell’s activities

10. ATP: Adenosine Triphosphate
3 phosphates

11. ATP
ADP = Adenosine DiphosPhate
2 phosphates instead of 3

12. ATP
ATP  ADP
Terminal phosphate bond is broken
Energy is released

13. ATP
ADP  ATP
Phosphate added to ADP
Energy is stored

14. ATP Energy released from ATP is used to… Power active transport
Power the sodium- potassium pump
Power movement of organelles within the cell
ATP

15. ATP
Cells store small amounts of ATP because it is inefficient for storing energy

16. Energy from carbohydrates used to make ATP from ADP as needed

17. Don’t forget to chunk your notes!

18. When you exercise, ATP stored in muscles is used first.
Cellular respiration
When you exercise, ATP stored in muscles is used first.

19. Cellular respiration lactic acid fermentation
Muscles low on O 2 begin producing ATP through _______ ___ _____________ .
lactic
acid
fermentation

20. Lactic acid is eliminated by heavy breathing (taking in more O 2 ).
Cellular respiration
Lactic acid is eliminated by heavy breathing (taking in more O 2 ).

21. Electron Transport Chain
Cellular respiration
Glucose (C6H1206) +
Oxygen (02)
Glycolysis
Krebs Cycle
Electron Transport Chain
Carbon
Dioxide
(CO2) +
Water
(H2O)
Cellular respiration can produce ATP for exercise lasting about 30 minutes.

22. What is cellular respiration’s primary goal?
To make energy. But it also produces carbon dioxide & water.

23. Cellular Respiration Equation
C6H12O6 + 6O2  6CO2 + 6H2O + Energy

24. Don’t forget to chunk your notes!

25. photosynthesis
Plants are producers that use photosynthesis to make their own ______ .
food
food

26. as reactants for photosynthesis.
Plants need ____ & ____
as reactants for photosynthesis.
H 2 O
CO 2
Water & carbon dioxide

27. These reactants come from ___ ______ .
photosynthesis
These reactants come from ___ ______ .
Cellular respiration
Cellular
Respiration

28. What is photosynthesis’ primary goal?
To make glucose (food) for plants. But it also produces oxygen!

29. carbon dioxide + water  glucose + oxygen
light
6CO H2O  C6H12O O2
carbon dioxide + water  glucose + oxygen

30. Don’t forget to chunk your notes!

31. Compare and contrast Photosynthesis Respiration Energy storage
Function
Energy storage
Energy release
Location
Chloroplasts
Mitochondria
Reactants
CO2 and H2O
C6H12O6 and O2
Products
Equation
6CO2 + 6H2O C6H12O
C6H12O CO2+ 6H2O

32. Compare and contrast

33. Do now activity #5 Define ATP.
What is the difference between ADP and ATP?
Write down the photosynthesis equation.
Write down the cellular respiration equation.