Cell Energy

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Cell Energy

• All cells need energy to survive. Plant Cells
  energy comes from the sun and nutrients in the
  soil. Animal Cells energy comes from food.

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Photosynthesis

• Plants have pigments that absorb light.
• Chlorophyll is the main pigment that gives the
  plant its green color.
• Chlorophyll is found in Chloroplasts.

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• Plants use the energy captured by chlorophyll to
  change to carbon dioxide and water into food.
• The food is then changed into glucose. ( sugar)
  The glucose is stored in the plant.
• Photosynthesis produces oxygen.

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Getting energy from food.

• There are a couple ways of getting energy from
  food.
• Cellular Respiration- the process by which cells
  use oxygen to produce energy from food.

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• Most complex organisms ( plants and animals)
  obtain energy through cellular respiration.
• During C. R. food is broken down into CO2 and
  H2O.
• Animals use most energy to maintain body temp.
• Some energy is used to form adenosine
  triphosphate. ( ATP)

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• Prokaryotic Cells-CR takes place in the cell
  membrane.
• Eukaryotic Cells- CR takes place in the
  mitochondria.
• Fermentation- the breakdown of food without the
  use of oxygen
• Two Types

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• 1. Fermentation happens in your muscles and
  produce lactic acid.
• This is why your muscle begin to have a burning
  sensation. ( Muscle Fatigue)
• 2. Fermentation happens in some types of bacteria
  and yeast.

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Connection between Photosynthesis and CR

• During photosynthesis cells use CO2 to make
  glucose and the cell release O2.
• During CR cells use O2 to break down glucose and
  release CO2

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Ill be Back..
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• http//highered.mcgraw-hill.com/sites/dl/free/0078
  617022/164155/00053412.html (Photosynthesis
  /consumption)
• http//i-biology.net/ Fossil Fuels