Back up…
• Where did the glucose come from?
• How did the glucose get into your cells?
Cellular Respiration
• A bunch of small steps to break down the glucose
• If we burned it all up at once, what would happen?
• Do we want that inside our cells?
Who is the powerhouse inside of the cell?
• Mitochondrion• Folded membranes =
more room for reactions
What reaction is taking place in the mitochondria?
• Cellular respiration• Glucose + oxygen Carbon dioxide + water +
energy• AEROBIC process
(requires oxygen)
C6H12O6 + O2 CO2 + H20
Which molecules store the MOST energy?
Who is the energy carrier inside of a cell?
• ATP• Adenosine tri-
phosphate
WHAT MACROMOLECULE CLASS DOES ATP FIT INTO?
Where does ATP store its energy?
• In the phosphate bonds!
• So the more phosphates you have, the more energy you have!
• Why? Phosphates are negatively charged…
Comparison purposes
• ATP • ADP
Why recharge?
• If not, we would have to consume our entire body weight in ATP every day!!! That’s a LOT of food!
How much energy?
• One glucose molecule = ~34-36 ATP
• Each muscle cell has about 600 million ATP molecules
• 10 million ATPs can be consumed and recharged every second per cell!
How long does one ATP last?
• About 3 seconds…• Long term energy
storage = ?
