Bell Ringer 12/02/14  Write: Would you rather receive $100 in the form of one bill or 100 $1 bills?  Explain your choice thoroughly  Evaluate the pros and cons of both choices

All Living Things Require Energy

Where do living things get energy?  Autotrophs  Heterotrophs  Does food give you energy?

The Answer?  Yes and No  Yes: The food we eat has potential energy stored in the form of sugar and other carbon-based molecules that we need to survive  No: The energy stored in food is not in a form that our cells can use  What is the form of energy our cells use?

ATP  Adenosine Triphosphate  All cells use ATP for energy  Helps cells build molecules and move materials  ATP is like  Cells “spend” ATP, but they have to work to make more so they don’t run out

How do cells use ATP?  Copy the diagram on the white board

How do cells get ATP?  Food does not contain ATP  Plants and Animals perform Cellular Respiration to convert the energy in food to ATP  Amount of ATP that can be made depends on the type of molecule  Glucose yields about 38 molecules of ATP  A Triglyceride can yield up to 46 molecules of ATP