2007-2008

Cellular RespirationHarvesting Chemical Energy

ATP

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:

What do we need energy for?• synthesis (building)• reproduction• active transport (pumping)• movement• temperature control (making heat)

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?

ATP

What is energy in biology?

Adenosine TriPhosphate

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

Mitochondria are everywhere!!

animal cellsanimal cells plant cellsplant cells

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

Profile: Cell Respiration

• Who does it?• What is it?• When does it happen?• Where does it happen?• Why does it happen?