Anaerobic Respiration– Cellular Respiration Without Oxygen Packet #14 Chapter #4

Anaerobic Respiration I For most animal and plant cells, glycolysis is only a prelude {first set of stages} to the final stages of the breakdown of food molecules. In animals, such as humans, oxygen is used in later stages to complete the breakdown of food molecules.

Anaerobic Respiration II However, for organisms that do not use oxygen, and are able to grow and divide without it, glycolysis is the principle source of a cell’s ATP.

Anaerobic Respiration II If no oxygen is available, the pyruvates formed at the end of glycolysis do not enter the Kreb’s Cycle but follow other pathways known fermentation pathways.

Anaerobic Fermentation IV There are two fermentation pathways Lactate Acid fermentation Produces lactic acid Causes cramps in muscles Alcoholic fermentation Produces ethanol & CO2 Produced by yeast cells Helps rise bread during baking.

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