Bell Ringer 10/17/11 —  Your parents are giving you $100 for your birthday. Would you rather receive the money in one $100 bill or 100 $1 bills? Why? —  What are the advantages and disadvantages for each option? All Living Things Require Energy Where do living things get energy? —  Heterotrophs —  Autotrophs —  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 within food is not in a type of energy that our cells can use. —  What is the energy cells use? ATP —  All cells use ATP for energy. —  Helps cells build molecules and move materials —  ATP is like —  Cells can “spend” ATP, but they have to work to make more ATP so they don’t run out. How do cells use ATP? 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 36 ATP molecules —  A Triglyceride can yield up to 146 molecules of ATP Before you go… Food Contains Like Proteins Whose energy is converted into By cells.