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Simple Cellular Respiration

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by

Kristin Craft

on 2 October 2014

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Transcript of Simple Cellular Respiration

Cellular Respiration

The process that releases energy by breaking down glucose and other food molecules in the presence of oxygen.
Oxygen: Taken in through lungs, gills, leaves, skin, etc.

The release of energy without oxygen is called "fermentation" and is not nearly as productive as respiration.
Glucose

The product of photosynthesis.
*Created and used by autotrophs.
*Eaten and used by heterotrophs.
*Unused portions are stored in the body as carbohydrates or lipids.
ENERGY!

This is the purpose of respiration - it's an exothermic reaction that produces energy.

ATP = Adenosine Triphosphate - the molecule that stores energy used for cellular processes.

For each molecule of glucose, 38 molecules of ATP are produced.
Carbon Dioxide

A waste product. We exhale this to get rid of it.
Water

This is passed as urine, exhaled, or absorbed by the body for other purposes.
3 Stages of Cellular Respiration
Glycolysis
Glucose is broken in half to form pyruvic acid.
Occurs in the cytoplasm.
Electron Transport Chain
Uses electrons from the Kreb's cycle to turn ADP into ATP.

Occurs in the inner mitochondrial membrane.
Kreb's Cycle
Pyruvic acid broken down into carbon dioxide through a series of reactions.

Occurs in the mitochondria.
Full transcript