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Photosynthesis

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The document discusses photosynthesis and how plants use it to produce energy and food. Photosynthesis has two main processes - the energy reactions that use sunlight to produce ATP and the sugar reactions that use ATP and carbon dioxide from the air to produce sugars. It requires sunlight, carbon dioxide, and water and produces oxygen as a byproduct. The chloroplasts in plant cells are where photosynthesis takes place.

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2006-2007
Photosynthesis: Life from Light and Air 2006-2007
Plants are energy producers Like animals, plants need energy to live Unlike animals, plants dont need to eat food to make that energy Plants make both food & energy animals are consumers plants are producers
How do plants make energy & food? Plants use the energy from the sun to make ATP energy to make sugars glucose, sucrose, cellulose, starch, & more sun ATP sugars
Building plants from sunlight & air Photosynthesis 2 separate processes energy building reactions collect sun energy use it to make ATP sugar building reactions take the ATP energy collect CO 2 from air & H 2 O from ground use all to build sugars ATP sun sugars + carbon dioxide CO 2 sugars C 6 H 12 O 6 water H 2 O + H 2 O CO 2
Using light & air to grow plants Photosynthesis using sun energy to make ATP using carbon dioxide & water to make sugar in chloroplast allows plants to grows makes a waste product oxygen 6CO 2 6H 2 O C 6 H 12 O 6 6O 2 sun energy + + + glucose + oxygen carbon dioxide sun energy + water + ( ATP )
What do plants need to grow? The factory for making energy & sugars chloroplast Fuels sunlight carbon dioxide water The Helpers enzymes ATP Make ATP! Make sugar! I can do it all And no one even notices! enzymes sun H 2 O sugars CO 2
Photosynthesis energy building reactions sugar building reactions ATP ADP sugar sun CO 2
Chloroplasts are only in plants animal cells plant cells
Chloroplasts Chloroplasts in cell Leaf Leaf Chloroplast absorb sunlight & CO 2 make energy & sugar Chloroplasts contain Chlorophyll CO 2
Bring In CO 2 H 2 O light Let Out O 2 Move Around sugars So what does a plant need? roots shoot leaves 6CO 2 6H 2 O C 6 H 12 O 6 6O 2 light energy + + +
Leaf Structure phloem (sugar) xylem (water) stomate guard cell palisades layer spongy layer cuticle epidermis
Transpiration H 2 O CO 2 CO 2 O 2 H 2 O gases in & out water out O 2 xylem (water) stomate guard cell
Transpiration Water evaporates from the stomates in the leaves water molecules stick to each other more water is pulled up the tree
Stomates Function of stomates CO 2 in O 2 out H 2 O out guard cell stomate
油
Xylem carry water up from roots
Phloem: food-conducting cells carry sugars around the plant wherever they are needed new leaves fruit & seeds roots
Putting it all together Making a living sunlight leaves = solar collectors photosynthesis gases: CO 2 in & O 2 out stomates = gases in & out H 2 O roots take in water from soil pulled up by leaf evaporation nutrients roots take in from soil
How are they connected? Respiration Photosynthesis glucose + oxygen carbon + water + energy dioxide C 6 H 12 O 6 6O 2 6CO 2 6H 2 O ATP + + + 6CO 2 6H 2 O C 6 H 12 O 6 6O 2 light energy + + + glucose + oxygen carbon dioxide sun energy + water +
Energy cycle Photosynthesis Cellular Respiration O 2 CO 2 plants animals , plants ATP H 2 O sun The Great Circle of Life! Where s Mufasa? glucose
The poetic perspective All of the solid material of every plant was built out of thin air All of the solid material of every animal was built from plant material Then all the cats, dogs, mice, people & elephants are really strands of air woven together by sunlight! sun air
2006-2007 Got the energy Ask Questions !!
Energy needs of life All life needs a constant input of energy Animals = Heterotrophs get their energy from eating others eat food = other organisms = organic molecules make energy through respiration Plants = Autotrophs get their energy from self get their energy from sunlight build organic molecules (food) from CO 2 make energy through photosynthesis
How do plants live? Photosynthesis Energy building reactions collect sun energy make ATP Sugar building reactions use ATP for energy use CO 2 as carbon for new sugars build sugars glucose, cellulose, starch build all other organic molecules proteins, lipids, carbohydrates, DNA store energy for future use starch in seeds & roots
油
Photosynthesis This is the equation you are used to seeing, but this is not the whole story + water + energy glucose + oxygen carbon dioxide 6CO 2 6H 2 O C 6 H 12 O 6 6O 2 light energy + + +

More Related Content

Photosynthesis

  • 2. Photosynthesis: Life from Light and Air 2006-2007
  • 3. Plants are energy producers Like animals, plants need energy to live Unlike animals, plants dont need to eat food to make that energy Plants make both food & energy animals are consumers plants are producers
  • 4. How do plants make energy & food? Plants use the energy from the sun to make ATP energy to make sugars glucose, sucrose, cellulose, starch, & more sun ATP sugars
  • 5. Building plants from sunlight & air Photosynthesis 2 separate processes energy building reactions collect sun energy use it to make ATP sugar building reactions take the ATP energy collect CO 2 from air & H 2 O from ground use all to build sugars ATP sun sugars + carbon dioxide CO 2 sugars C 6 H 12 O 6 water H 2 O + H 2 O CO 2
  • 6. Using light & air to grow plants Photosynthesis using sun energy to make ATP using carbon dioxide & water to make sugar in chloroplast allows plants to grows makes a waste product oxygen 6CO 2 6H 2 O C 6 H 12 O 6 6O 2 sun energy + + + glucose + oxygen carbon dioxide sun energy + water + ( ATP )
  • 7. What do plants need to grow? The factory for making energy & sugars chloroplast Fuels sunlight carbon dioxide water The Helpers enzymes ATP Make ATP! Make sugar! I can do it all And no one even notices! enzymes sun H 2 O sugars CO 2
  • 8. Photosynthesis energy building reactions sugar building reactions ATP ADP sugar sun CO 2
  • 9. Chloroplasts are only in plants animal cells plant cells
  • 10. Chloroplasts Chloroplasts in cell Leaf Leaf Chloroplast absorb sunlight & CO 2 make energy & sugar Chloroplasts contain Chlorophyll CO 2
  • 11. Bring In CO 2 H 2 O light Let Out O 2 Move Around sugars So what does a plant need? roots shoot leaves 6CO 2 6H 2 O C 6 H 12 O 6 6O 2 light energy + + +
  • 12. Leaf Structure phloem (sugar) xylem (water) stomate guard cell palisades layer spongy layer cuticle epidermis
  • 13. Transpiration H 2 O CO 2 CO 2 O 2 H 2 O gases in & out water out O 2 xylem (water) stomate guard cell
  • 14. Transpiration Water evaporates from the stomates in the leaves water molecules stick to each other more water is pulled up the tree
  • 15. Stomates Function of stomates CO 2 in O 2 out H 2 O out guard cell stomate
  • 16. 油
  • 17. Xylem carry water up from roots
  • 18. Phloem: food-conducting cells carry sugars around the plant wherever they are needed new leaves fruit & seeds roots
  • 19. Putting it all together Making a living sunlight leaves = solar collectors photosynthesis gases: CO 2 in & O 2 out stomates = gases in & out H 2 O roots take in water from soil pulled up by leaf evaporation nutrients roots take in from soil
  • 20. How are they connected? Respiration Photosynthesis glucose + oxygen carbon + water + energy dioxide C 6 H 12 O 6 6O 2 6CO 2 6H 2 O ATP + + + 6CO 2 6H 2 O C 6 H 12 O 6 6O 2 light energy + + + glucose + oxygen carbon dioxide sun energy + water +
  • 21. Energy cycle Photosynthesis Cellular Respiration O 2 CO 2 plants animals , plants ATP H 2 O sun The Great Circle of Life! Where s Mufasa? glucose
  • 22. The poetic perspective All of the solid material of every plant was built out of thin air All of the solid material of every animal was built from plant material Then all the cats, dogs, mice, people & elephants are really strands of air woven together by sunlight! sun air
  • 23. 2006-2007 Got the energy Ask Questions !!
  • 24. Energy needs of life All life needs a constant input of energy Animals = Heterotrophs get their energy from eating others eat food = other organisms = organic molecules make energy through respiration Plants = Autotrophs get their energy from self get their energy from sunlight build organic molecules (food) from CO 2 make energy through photosynthesis
  • 25. How do plants live? Photosynthesis Energy building reactions collect sun energy make ATP Sugar building reactions use ATP for energy use CO 2 as carbon for new sugars build sugars glucose, cellulose, starch build all other organic molecules proteins, lipids, carbohydrates, DNA store energy for future use starch in seeds & roots
  • 26. 油
  • 27. Photosynthesis This is the equation you are used to seeing, but this is not the whole story + water + energy glucose + oxygen carbon dioxide 6CO 2 6H 2 O C 6 H 12 O 6 6O 2 light energy + + +

Editor's Notes

  • #21: So, in effect, photosynthesis is respiration run backwards powered by light. Cellular Respiration oxidize C 6 H 12 O 6 CO 2 & produce H 2 O fall of electrons downhill to O 2 exergonic Photosynthesis reduce CO 2 C 6 H 12 O 6 & produce O 2 boost electrons uphill by splitting H 2 O endergonic