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Cellular Respiration

Cellular Respiration. An Overview. Cellular Respiration is the process that releases energy by breaking down glucose an other food molecules in the presence of oxygen. 6O 2 + C 6 H 12 O 6 6CO 2 + H 2 O + Energy. Glycolysis.

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Cellular Respiration

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  1. Cellular Respiration An Overview

  2. Cellular Respiration is the process that releases energy by breaking down glucose an other food molecules in the presence of oxygen. 6O2 + C6H12O6 6CO2 + H2O + Energy

  3. Glycolysis • Glucose (A six carbon sugar) is broken down into two 3-carbon pyruvic acid molecules. • This process requires two ATP moleules. • This process creates 4 ATP molecules and 2 NADH molecules for the electron transport chain.

  4. Fermentation • An anaerobic respiration meaning that oxygen is not required. • Two types of fermentation: • Alcoholic Fermentation • Lactic Acid Fermentation

  5. Alcoholic Fermentation • Used by yeast and a few other microorganisms. • Produces Ethyl Alcohol and CO2 as wastes. Pyruvic Acid + NADH Alcohol + CO2 + NAD+

  6. Lactic Acid Fermentation • Produced in many cells including your muscles. Pyruvic Acid + NADH Lactic Acid + NAD+ Lactic Acid is produced during rapid exersize, causing a painful,burning sensation. This effect is reduced with potassium.

  7. Kreb’s Cycle • During the Kreb’s Cycle, pyruvic acid from glycolysis is used to make CO2, NADH, ATP, and FADH2. • Occurs in the mitochondria. • The end energy tally from 1 Glucose (2 pyruvic acids) is: • 6 NADH • 2 FADH2 • 2 ATP

  8. Electron Transport • The Krebs Cycle creates high energy electrons. • These electrons are passed along a series of proteins in the mitochondrial membrane. • The electrons from the 6 NADH are used to form 18 ATP molecules. • The electrons from the 2 FADH2 are used to make 2 ATP molecules.

  9. Cellular Respiration of Glucose Molecule. Glycolysis = 6 ATP Krebs Cycle and Electron Transport Chain = 30 ATP Grand Total of 36 ATP molecules from 1 Glucose!

  10. Energy and Exersize • Quick Energy comes from ATP in the muscle cell ready for use. • a few seconds • Long Term Energy- cellular respiration provides energy for at least 20-30 minutes. • Fermentation occurs more rapidly so it also kicks in. • After 20-30 minutes, other molecules, such as fats or proteins are used for energy.

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