Define the following terms: Metabolism:   Metabolism: Autotrophic: Heterotrophic: The sum total of ALL chemical reactions in our cells. This includes the breaking down of our food (digesting) and the using of that food to make new substances for the cell. Organisms that make their own food/sugars through the process of photosynthesis. Organisms that consume other organisms

Gets absorbed into our blood and taken to every cell in our body. Breathing/Respiration is when we inhale air that contains oxygen and we exhale air that contains carbon dioxide.   Where does the oxygen go once we inhale and fill up our lungs? Where does the carbon dioxide come from that we exhale? Cellular respiration is the process of breaking down sugar into energy. This process uses sugar and oxygen and produces carbon dioxide and energy. Gets absorbed into our blood and taken to every cell in our body. It comes from our cells. It is a waste product that is formed when our cells break down sugar and oxygen for energy during cellular respiration.

Cell Respiration E = ATP , a molecule that stores ENERGY for our cells to cash in to do work.

Energy Charged battery, stores energy When a cell needs energy it can cash in an ATP molecule. The cell does this by removing a “P”. When the bond between the phosphates are broken the energy is released. When the “P” is removed, energy is released and ATP becomes ADP, a second “P” can be removed for more energy and it can become AMP . It is like rechargeable battery that now needs charged again. In order to recharge the battery or to bond the “P” back on we need to eat carbs/sugars. The energy in the carbs is now stored in the bonds of the “P’s”. Energy

100% charged battery 0% charged battery Cell cashes in ATP for energy to work. ATP -> remove P -> ADP All the ATP is cashed in and is now ADP, cell can’t get any more energy to work. Person now has to eat more carbs, the energy provided by the carbs reattach the P to ADP and makes ATP.

1 2 3 Test tube #1 5 grams yeast 5 grams sugar 25ml warm water Test tube #2 5 grams yeast NO sugar 25 ml warm water Test tube # 33 Test tube #4 -sample 2 5 grams yeast NO sugar NO warm water

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