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How do Cells Obtain Energy?

How do Cells Obtain Energy?. Cells of all organisms use energy to carry out the chemical activities that allow them to live, grow, and reproduce. Plants are able to capture light energy from the sun and change it into food through a process called photosynthesis .

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How do Cells Obtain Energy?

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  1. How do Cells Obtain Energy? • Cells of all organisms use energy to carry out the chemical activities that allow them to live, grow, and reproduce. • Plants are able to capture light energy from the sun and change it into food through a process called photosynthesis. • The food that plants make supply them with energy and also becomes a source of energy for the organisms that will eat the plants.

  2. What do you need for Photosynthesis? PHOTOSYNTHESIS

  3. Water from the soil PHOTOSYNTHESIS The sun Carbon dioxide from the air A plant

  4. PHOTOSYNTHESIS What does photosynthesis make?

  5. PHOTOSYNTHESIS Oxygen (waste) Food for plant (sugar)

  6. PHOTOSYNTHESIS sugar water + Carbon dioxide + Oxygen

  7. The sun Carbon dioxide from the air Water from the soil PHOTOSYNTHESIS Oxygen (waste) Food for plant (sugar)

  8. PHOTOSYNTHESIS Where does photosynthesis take place?

  9. PHOTOSYNTHESIS vacuole Cell wall nucleus Cell membrane Chloroplasts!!! Plant Cell

  10. Where Does Photosynthesis Take Place? • Chlorophyll in the chloroplasts capture the sun’s energy. • Carbon Dioxide enters the plant through small openings called stomata on the underside of leaves.

  11. Why is this important to us? • We cannot make our own food - so we must get our food from plants. • Plants are the first step in the food chain. • http://www.ecokids.ca/pub/eco_info/topics/frogs/chain_reaction/assets/flash/chain_reaction.swf • The oxygen released during photosynthesis is necessary for all living things.

  12. Brain Pop - Photosynthesis http://www.brainpop.com/science/cellularlifeandgenetics/photosynthesis/preview.weml http://www.brainpop.com/science/cellularlifeandgenetics/photosynthesis/

  13. Getting Energy from Food • The food that you eat has to be broken down so that the energy that it contains can be changed into a form that your cells can use. • Most organisms use cellular respiration to obtain energy from food. • In eukaryotic cells, cellular respiration takes place in the mitochondria

  14. Brain Pop – Cellular Respiration http://www.brainpop.com/science/cellularlifeandgenetics/cellularrespiration/

  15. EQUATIONFORPHOTOSYNTHESIS 6CO2 + 6H2O + ENERGY C6H12O6 + 6O2 CARBON DIOXIDE OXYGEN WATER light SUGAR

  16. EQUATION FORRESPIRATION C6H12O6 + 6O2 6CO2 + 6H2O + ENERGY CARBON DIOXIDE ATP SUGAR OXYGEN WATER

  17. Comparison of Photosynthesis and Cellular Respiration Photosynthesis Cellular Respiration

  18. Fermentation • Does NOT use oxygen • This is how cells get energy when they cannot get the oxygen they need for cellular respiration • Ex: Burning feeling you get in leg muscles = lactic acid build up (made during fermentation)

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