2007-2008 cellular respiration harvesting chemical energy atp
TRANSCRIPT
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2007-2008
Cellular RespirationHarvesting Chemical Energy
ATP
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Cellular Respiration
• A process used by all living things to extract energy from glucose
• This “form of energy” is called ATP, and it is a molecule
• All forms of life do it! (Bacteria, Fungi, etc).• Chemical Reaction:
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What do we need energy for?• synthesis (building)• reproduction• active transport (pumping)• movement• temperature control (making heat)
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Where do we get energy?• Energy is stored in molecules
– carbohydrates, fats, proteins– Animals eat these– We digest food to get
• fuels for energy (ATP)• raw materials for building more molecules
What are the
monomers?
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ATP
What is energy in biology?
Adenosine TriPhosphate
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What do we need to make energy?
• The “furnace” for making energy– mitochondria
• Fuel– food
• carbohydrates, fats, proteins
• The Helpers– oxygen
• “aerobic”
– enzymesO2
food
ATP
Make ATP!Make ATP!
All I do all day…And no one
even notices!
enzymes
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Mitochondria are everywhere!!
animal cellsanimal cells plant cellsplant cells
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CO2 + H2O + heatfuel
(carbohydrates)
O2
“Burn fuels” to make energycombustionmaking heat energy by burning fuels in one step
ATP
CO2 + H2O + ATP (+ heat)
respirationmaking ATP energy (& some heat) by burning fuels in many small steps
food(carbohydrates)
O2
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Profile: Cell Respiration
• Who does it?• What is it?• When does it happen?• Where does it happen?• Why does it happen?