Absorbtive and Postabsorptive States in Digestion Essay

This essay has a total of 381 words and 2 pages.


Absorbtive and Postabsorptive States in Digestion




Absorptive and Postabsorptive States


The absorptive state is the time during and right after eating a meal. The absorptive
state lasts for four hours, during and after each meal. During this state glucose is the
most important energy fuel. Amino acids and fats are used to form degraded protein, and
small amounts are used to provide ATP. Metabolites are transformed to fat if they are not
used for anabolism. Glucose is formed by the conversion of fructose and galactose, which
are stored in the liver from the entrance of monosaccharides. Glucose is released into
the blood, or converted to glycogen and fat. Some glucose enters the liver and is used
for energy, and any that is not used will be stored in skeletal muscle as glycogen or in
adipose cells as fat. Liver, skeletal muscle, and adipose cells use triglycerides as
their primary energy source. Amino acid are also used by the liver to synthesize plasma
proteins. Essentially all of the events that occur in the absorptive state are directed
by insulin.


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