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Fatty acid oxidation
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gluconeogenesis p. 76
metabolism of p. 45, 70, 87, 88
oxidation of p. 72, 72
synthesis p. 70
fatty acid p. 87
Our bodies are capable of surviving without food for long periods of time, at least 3-4 weeks with hydration!
The reason we can do that is that we can store our dietary fuels, and then break them down when needed to make energy in the form of adenosine triphosphate, or ATP.
Fat is one of the most important ways we store energy and the term “burning fat”, actually refers to fatty acid oxidation.
In fact, if two individuals were stranded in the Andes mountains with no food, the person with more fat content would survive longer - yet another reason to avoid working out.
The transfer of electrons in the form of hydrogen from these fatty acids to certain molecules, can then be used to generate ATP.
Before we can oxidize fat, it needs to be moved from storage sites to the cells that can use it. Fat is stored in adipocytes or fat cells as triglycerides, which are 3 fatty acids attached to a glycerol molecule.
Now, the free fatty acids can leave the fat cell, and enter the bloodstream, where they bind to a protein called albumin.
Fatty acid oxidation is the process your body uses to break down and uses fatty acids for energy. This process occurs in the mitochondria of your cells. During fatty acid oxidation, a fatty acid is broken down into two molecules of acetyl coenzyme A (CoA). These molecules are then used by the mitochondria to produce energy.
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