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Related Concept Videos

Regulation of Food Intake01:30

Regulation of Food Intake

Short-term regulation of food intake primarily involves neural signals from the gastrointestinal (GI) tract, blood nutrient levels, and GI tract hormones. Communication between the gut and brain via vagal nerve fibers plays a significant role in evaluating the contents of the gut. Clinical studies have shown that protein ingestion produces a more prolonged response in these nerve fibers compared to an equivalent amount of glucose. Additionally, the activation of stretch receptors caused by GI...
Model Approaches for Pharmacokinetic Data: Physiological Models01:15

Model Approaches for Pharmacokinetic Data: Physiological Models

Physiological models in pharmacokinetics are instrumental in understanding the distribution and elimination of drugs within the body. These models describe the drug concentration within target organs, influenced by factors such as drug uptake, tissue volume, and blood flow. Drug uptake is governed by the partition coefficient, which signifies the drug concentration ratio in tissue to that in the blood. The blood flow rate to a specific tissue is expressed as Qt, and the rate of change in tissue...
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Physiological Pharmacokinetic Models: Assumption with Protein Binding

Physiological models with protein binding in pharmacokinetics offer a sophisticated approach to understanding drug disposition. These models consider drug-protein interactions, enabling them to effectively predict drug concentrations in different organs and tissues. This precision aids in accurate drug dosing, providing a significant advantage over conventional models. A key process within these models is equilibration, which ensures that drug concentrations achieve a steady state within the...
Clearance Models: Physiological Models01:09

Clearance Models: Physiological Models

Drug clearance is a critical pharmacokinetic process involving the irreversible removal of drugs from the body through various organs over a specified time period. Physiological models are indispensable in determining organ-specific clearance, defined by the proportion of the drug eliminated per unit of time from the organ's blood volume.
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Metabolic States of the Body: Fasting and Starvation01:24

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During the initial hours of fasting, the body uses up its glycogen stores as an energy source. Once these glycogen reserves are depleted, the body begins breaking down stored triglycerides and structural proteins. During this stage, glycerol becomes a key substrate for gluconeogenesis, while free fatty acids undergo beta-oxidation to provide energy for tissues, such as skeletal muscle. In the fasting state, the body spares protein breakdown as much as possible to conserve muscle and structural...
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Regulation of Metabolism

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Related Experiment Video

Updated: May 28, 2026

Control of Eating Behavior Using a Novel Feedback System
04:48

Control of Eating Behavior Using a Novel Feedback System

Published on: May 8, 2018

Robust modeling of appetite regulation.

B Göbel1, M Chung, K M Oltmanns

  • 1Institute of Mathematics and Image Computing, University of Lübeck, Germany.

Journal of Theoretical Biology
|October 4, 2011
PubMed
Summary

This study mathematically models appetite regulation, highlighting the brain's crucial role as an energy consumer. Our findings explain human food intake patterns, even with incomplete understanding of metabolic pathways.

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Area of Science:

  • Physiology
  • Mathematical Biology
  • Neuroscience

Background:

  • Appetite regulation involves complex interactions between energy intake and expenditure.
  • Understanding the brain's role in energy consumption is key to metabolic health.

Purpose of the Study:

  • To mathematically model the interaction between appetite activation and the body's energy content.
  • To investigate the role of the brain as an energy consumer in appetite regulation.
  • To explore implications for human food intake patterns and circadian rhythms.

Main Methods:

  • Mathematical modeling using general influence functions with saturation.
  • Analysis of model behavior concerning circadian periodicity of human food intake.
  • Investigation of physiological assumptions on constitutive functions.

Main Results:

  • The brain plays an indispensable role as an energy consumer in appetite regulation.
  • Physiologically reasonable assumptions are sufficient to validate the brain's role.
  • The model provides insights into human food intake patterns.

Conclusions:

  • Mathematical modeling offers valuable insights into complex physiological systems like appetite regulation.
  • The brain's energy consumption is a critical factor in maintaining metabolic balance.
  • Further research can build upon this model despite uncertainties in metabolic pathway quantification.