Summary of Control de la ingesta alimentaria

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The brain plays an important role in regulating food intake. When we are hungry, leptin levels in our blood drop and this is detected by neurons in the nucleus of the arcuate nucleus. This leads to a decrease in metabolism and the activation of signals for food intake. When we finish eating, leptin levels rise and this is detected by neurons in the nucleus 4. This leads to an increase in metabolism and the activation of signals to increase blood flow to the muscles.

  • 00:00:00 The system that regulates food intake is important for maintaining a healthy energy balance. This system is composed of a variety of substances with joint or opposing actions that are synthesized in different tissues, such as the gastrointestinal tract, adipose tissue, and pancreas. This system will act depending on the stage of food intake, for example, it will take about 2-3 hours for the stomach to move once hunger is detected, and this is where centers that control hunger and satiety are found mainly in the hypothalamus. These centers receive a series of signals related to the metabolic state, and these neuronal centers participate in the regulation of food intake. Nuclear 4 in the hypothalamus is particularly involved in the control of appetite, and this nucleus contains two neuronal networks that are sensitive to signals of hunger and satiety. One network is sensitive to catecholamines, and the other is sensitive to signals of satiety. The beginning of food intake involves the presence of communication circuits between the hypothalamus, amygdala, hippocampus, and cortical areas that project molecules that control food intake behavior. In addition to the release of insulin, numerous responses related to food intake will be activated, such as salivation, thermogenesis, gastric secretion, increase in locomotor activity, and an increase
  • 00:05:00 This video discusses how the brain controls food intake. It explains that when we are hungry, there is a reduction in levels of the hormone leptin in our blood. This will be detected by neurons in the nucleus of the arcuate nucleus (AR4), which contain neuropeptides and proteins related to the gut. These neurons inhibit the cells in the ventral striatum, which controls the release of the hormone stimulant of thyroid, and the hormone adrenocorticotropic hormone (ACTH). This decreases the rate of metabolism, and also activates the signals for ventricles in the brainstem, which controls the system parasimpatic. Additionally, it stimulates the behavior of food intake in the hypothalamus. Meanwhile, when we finish eating, there is an increase in leptin levels in blood detected by the nuclear 4. Here, in the neuropeptides alpha more than is hormone stimulator of melanocytes and Card, these neurons excite the cells to ventricles and releases the hormone stimulant of thyroid and adreno core triacetate for just to increase the metabolism. Also, the cells are activated to ventricles in the system sympathetic to increase the flow of blood directly to the muscle cells. These controls are not static and are based on signals

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