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Warm-up 1. Define Cellular Respiration 2. Write-out the equation for Cellular Respiration 3. In what organelle does Cellular Respiration occur? 4. What organisms do it? What do Carbohydrates (glucose, simple sugars) do for organism such as you and me? They are the primary source of energy! Cellular Respiration Cellular Respiration During photosynthesis, plants make and store carbohydrates such as glucose. Plants must then break down glucose in order to release and use the energy it contains. This happens in a process called respiration. 1. What is it? The turning of FOOD into ENERGY 2. Why do we need cell respiration? Does FOOD = ENERGY NO!!! ATP= Energy How do they do this? Cellular Respiration • Respiration takes place in cell parts called the mitochondrion. Cellular Respiration • Respiration is not unique to plant cells. • ALL living things meet their energy needs through respiration Humans must turn the food they eat into ATP (energy) …. We do that through the process of cell respiration. “Respiration”? Many people use the word respiration to mean “breathing.” When we breathe air into our lungs, oxygen in the air enters our blood and is delivered to body cells. It is in cells that respiration actually takes place. Respiration Equation C6H12O6 + 6O2 = 6CO2 + 6H2O + energy Glucose + Oxygen =Carbon + water + energy dioxide Cellular Respiration vs. Photosynthesis • Respiration can be thought of as the opposite of photosynthesis. Photosynthesis: 6CO2 + 6H2O + sunlight = C6H12O6 + 6O2 Carbon + water + energy =Glucose + Oxygen dioxide ***Remember*** Photosynthesis: 6CO2 + 6H2O + sunlight = C6H12O6 + 6O2 Carbon + water + energy =Glucose + Oxygen Dioxide Respiration: C6H12O6 + 6O2 = 6CO2 + 6H2O + energy Glucose + Oxygen =Carbon + water + energy dioxide There are two types of cellular respiration: 1. Aerobic 2. Anaerobic 1. Aerobic- with oxygen C6H12O6 + O2 = CO2 + H2O + ATP Glucose +Oxygen =Carbon + water + energy dioxide 2. Anaerobic- WITHOUT oxygen C6H12O6 = CO2 + H2O + ATP Glucose = Carbon + water + Energy dioxide Two types of anaerobic 1. Humans 2. Yeast Lactic Acid Fermentation Alcoholic Fermentation Yeast ‘eat’ the sugars Lactic Acid builds up in and turn them into the muscles, causing alcohol you to ‘feel the burn’. Respiration - Is the cellular process that uses oxygen to break down glucose into carbon dioxide and water, which releases energy. So if respiration “undoes” photosynthesis, what is the point? Why can’t a plant just use the energy from the Sun directly without going through these two complex processes? The point. The light energy from the Sun first must be converted to a usable form- chemical energy. This stored energy allows a plant to grow and stay alive even at night and on cloudy days, when not enough sunlight is available for the plant to keep making carbohydrates.