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converts energy in food to energy in ATP.
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Formula for Cellular Respiration6O2 + C6H12O6 → 6CO2 + 6H2O + 36 ATP
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Food and CaloriesThe food and drink that you consume provide
a source of energy for your cells. The energy is used to make ATP.
calorie – the amount of energy needed to raise one gram of water one degree Celsius.
Kilocalorie (on labels) – 1000 caloriesFood also provides the building blocks for
your cellular products (proteins, hormones, etc.)
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An overview of Cellular RespirationCellular respiration can be aerobic (with oxygen),
or anaerobic, (without oxygen)Aerobic respiration has 3 main steps: 1. Glycolysis 2. Krebs Cycle 3. Electron Transport Chain
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Structure of MitochondriaA mitochondria’s structure is key to its role in cellular respiration.
An envelope of two membranes encloses the mitochondria and there is a space between the outer and inner membranes.
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Structure of a mitochondria continued…Inner Matrix-encloses a think fluid called the MATRIX
The complex folding pattern of this membrane allows for many sites where reactions can occur.
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A Road Map for Cellular RespirationA cell’s chemical processes make up a cell’s METABOLISM
Pathways-Anabolic and Catabolic
3 main stages
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Stage 1: GlycolysisMeans splitting of sugarBreaks down a glucose moleculeTAKES PLACE: outside the mitochondria in the cytoplasm of the cell
ATP Molecules produced: 4 made-2 used (net gain of 2)
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Stage 2: Krebs Cycle Finishes the breakdown of pyruvic acid molecules to carbon dioxide, releasing more energy in the process
TAKES PLACE: In the matrix within the mitochondria
ATP molecules produced: 2 ATP molecules
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Stage 3: Electron Transport Chain and ATP Synthase ActionTAKES PLACE: In the inner membrane of the mitochondria
ATP molecules produced: 32 ATP molecules