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    3 7 3 7 Document Transcript

    • Mesret Alemu & Urwa Imran 3.7 Cellular RespirationRespiration is the production of ATP from organic molecules - The controlled release of energy by enzymes from organic compoundsIn order to keep generating efficient ATP, tissues which have high energy demand are rich inmitochondria. - ATP is not a stable long-term energy store. Long term stores include lipids and glycogen which are metabolized through respirationGlucose is a 6 carbon organic compound which is split into 2 pyruvate molecules in cytoplasm with smallyield of ATPPyruvate 3 carbonsCarbon dioxide 1 carbonO carbons Water OxygenPhosphorus ATPAerobic respiration occurs in the presence of oxygen with a large yield of ATP, water is recycled in thecell, carbon dioxide is released through gas exchangeAnaerobic respiration occurs in the absence of oxygen, reactions do not continue in mitochondria witha low yield of ATP CO2 and ethanol and lactic acid are waste productsHexokinase is an enzyme that splits glucose into pyruvate molecules ( glycolysis) this is reversed whenATP levels return to normal