Respiration

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Respiration

• Converting and using energy

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Respiration
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Photosynthesis Review

• Photosynthesis stored energy in the form of
  glucose.
• Glucose is what animals and plants use as their
  source of energy.
• But ATP is the usable energy in a cellnot
  glucose. So

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Respiration What is it?

• Essentially cellular respiration breaks food
  particles (glucose) down into ATP.
• ATP is the form of energy that cells can use.
• Respiration provides all living things with the
  energy they need.
• This is aerobic respiration, which requires
  oxygen.

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Respiration What is it?
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Respiration Who does it?

• All living things do cellular respiration
  including plants.

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Respiration Where does it happen?

• Mitochondria of a cell
• The powerhouse of the cell
• Found in plants and animals

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Respiration How does it happen?

• 3 steps of respiration
• Glycolysis
• Glucose broken down into smaller parts 2
  molecules of Pyruvic Acid.
• ATP produced.
• Happens in the Cytosol
• Citric Acid Cycle (Krebs Cycle)
• Pyruvic Acid is broken down into CO2
• More ATP is produced.
• Happens in the Mitochondria.

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Respiration How does is happen?

• 3 steps of respiration
• Electron Transport Chain (ETC)

• Hydrogen is released and forms with oxygen to
  create water.
• More ATP is produced.
• Happens in the Mitochondria.

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Respiration How does is happen?

• Therefore the overall reaction of cellular
  respiration is the reverse of photosynthesis

• glucose oxygen ? CO2 water
• respiration
• photosynthesis

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Respiration How does is happen?

• Therefore the overall reaction of cellular
  respiration is the reverse of photosynthesis

• glucose oxygen ? CO2 water
• respiration
• photosynthesis

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So whats the moral of the photosynthesis
respiration story??

• ITS ALL ONE BIG CYCLE!!
• NO TREES MEANS NO BREATHING

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Anaerobic respiration

• Often referred to as fermentation
• Does not require oxygen (O2)
• Byproduct is alcohol or acids.
• Lactic acid is produced in your muscle cells
  after long periods of heavy exercise, when O2 is
  harder to get.
• Only happens in oxygen deprived environments
• - We had anaerobic respiration in our yeast lab!
  
• - Brewing
• Does not produce as much ATP as aerobic
  respiration, therefore plants and animals use
  aerobic respiration whenever they can.

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Check your understanding

• How is respiration different than photosynthesis,
  how are they the same?
• What is the definition of respiration?
• Through what 3 steps does respiration produce
  ATP?
• The cell of an organism that starved to death is
  tested and found to have a high concentration of
  pyruvic acid. What failed?