This term refers to the period that includes the evening meal, overnight fasting and breakfast. A
his description, however brief it is useful to understand the importance of breakfast followed by morning and the different fates nutrients at different times of the day.
1) phase or state of satiety postabsorptive
E 'at the stage immediately after the evening meal. The food is digested and the basic components of macronutrients (glucose, amino acids and fatty acids) pass from the intestine into the blood.
In this condition there is secretion of insulin, which promotes the accumulation of energy reserves and protein synthesis.
Excess glucose in the blood is removed through the liver and is stored as glycogen before and after as fat.
2) Initial phase of fasting
After a few hours after the meal, the concentration of glucose in the blood decreases. It is thus inhibited the production of insulin and the hormone glucagon is secreted instead.
are so mobilized energy reserves of glycogen, it blocks the synthesis of fatty acids, is inhibited glycolysis and stimulated gluconeogenesis.
This will form glucose which is released into the blood, albeit at low levels of insulin does not enter muscle and fat tissue.
In this condition, fatty acids are the source of energy in the liver and muscles.
3) refeeding phase
After breakfast, the fat follows the same metabolic fate of Phase 1, the fate of the sugar it's different.
The liver does not absorb, but leave them available to the tissues peripheral, continuing to work with gluconeogenesis. Glucose is formed to restore the glycogen stores of the liver.
As the salt concentration of glucose in the blood, liver completes its supply of glycogen and starts to metabolize the remaining excess glucose in the direction of fatty acid synthesis.
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