Cellular Respiration Harvesting Chemical Energy ATP Regents Biology

Cellular Respiration Harvesting Chemical Energy ATP Regents Biology 2006 -2007

Energy needs of life § Animals are energy consumers u What do we need energy for? § § § Regents Biology ________________________ ____________

Where do we get energy? § Energy is stored in organic molecules ___________________ Animals eat these organic molecules ____ u digest food to get u § § _____________________________________________ w _______________________ Regents Biology

What is energy in biology? ATP Whoa! Hot stuff! Regents Biology 2006 -2007

Harvesting energy stored in food § Cellular respiration u __________________ § ________________________ u formula shows glucose, but that is just an example § could be other sugars, fats or proteins glucose + oxygen carbon + water + energy dioxide C 6 H 12 O 6 + Regents Biology 6 O 2 6 CO 2 + 6 H 2 O + ATP + heat

What do we need to make energy? Make ATP! § The “Furnace” Make ATP! u ________ § Fuel u All I do all day… And no one even notices! ________ § carbohydrates, fats, proteins food § The Helpers u ________ § “aerobic” O 2 u ________ Regents Biology ATP

“Burn fuels” to make energy combustion making heat energy by burning fuels in one step fuel (carbohydrates) O 2 CO 2 + H 2 O + heat respiration making ATP energy (& some heat) by burning fuels in many small steps ATP Regents Biology food (carbohydrates) O 2 CO 2 + H 2 O + ATP (+ heat)

Using ATP to do work? Can’t store ATP § too unstable § only used in cell that produces it § only short term energy storage § carbohydrates & fats are long term energy storage Whoa! Pass me the glucose & oxygen! Regents Biology ATP work ADP + P A working muscle recycles over 10 million ATPs per second

A Body’s Energy Budget food intake ATP synthesis storage Regents Biology { { { • ___________ • ___________

What if oxygen is missing? § Can’t complete aerobic respiration u ___________ § yeast w _____________ w make beer, wine, bread u ___________ § bacteria, animals w _____________ w make yogurt w animals feel muscle fatigue Regents Biology O 2

Any Questions? ? Regents Biology 2006 -2007