Chemical reactions to sustain life

• 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)

• 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

• the faster metabolism?
– Male or female?
– Warm or cold?
– Young or old?
– Warm blooded or cold blooded?

• 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

• 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….

• 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