Metabolism Chemical reactions to sustain life

Metabolism Example Potato= cellulose (cell walls) + starch (energy) “carbs” Catabolism—the potato (cellulose + starch) gets digested by animals to make  glucose then glucose  is used to get ATP energy immediately for the body (cellular respiration) ATP used for chemical reactions. Anabolism—sugar or glucose (liver takes it from catabolism)  excess made into glycogen for long term Energy storage for your body (stored in liver)

Metabolism Example Hamburger= muscle protein  chains of amino acids Digestion occurs  catabolism is the digestion of the protein Anabolism  individual amino acids are put back together to build a new protein for your body…..new protein could be collagen or an enzyme the body needs

Metabolism is affected by many factors the faster metabolism? – Male or female? – Warm or cold? – Young or old? – Warm blooded or cold blooded?

Energy coupling Catabolism fuels anabolism ATP is regenerated by the process of digesting food….so ADP  ATP The catabolic process is cellular respiration First step of cellular respiration is glycolysis or the breaking down of glucose and eventually producing ATP

Energy coupling After food is broken down….then we build it up or reconstruct it into other macromolecules the body needs. This requires energy…where does the energy come from (food) or ATP. So ATP (used)  ADP This building up of macromolecules…..anabolism….

What regulates this process? Hormones regulate the body and tells whether it should be in a catabolic or anabolic state. Turn to page 11—relate this to negative feedback Turn to page 983—relate this to maintenance of glucose