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 = ?