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Regulation of Food Intake

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...

Primary Motives: Hunger and Thirst

Primary Motives: Hunger and Thirst

Hunger and thirst are fundamental physiological drives crucial for maintaining homeostasis and ensuring the survival of both humans and animals. These drives are regulated through complex interactions between the brain, hormones, and sensory receptors.
Hunger arises when the brain detects changes in the body's nutrient levels, including glucose, lipids, amino acids, and hormones such as ghrelin and leptin. The hypothalamus plays a central role in hunger regulation. The lateral hypothalamus acts...

Hormonal Regulation

Hormonal Regulation

Hormones regulate a significant portion of digestion through activation of the neuroendocrine system. The neuroendocrine system of digestion contains many different hormones all with multiple functions that are both, directly and indirectly, involved in digestion.

Hormonal Regulation

Hormonal Regulation

The renin-aldosterone system is an endocrine system which guides the renal absorption of water and electrolytes, thus managing blood pressure and osmoregulation. Activation of the system begins in the kidneys with a small cluster of cells adjacent to the afferent and efferent blood vessels of the renal corpuscle. As the nephrons are filtering blood, juxtaglomerular cells monitor blood pressure. If they detect a decrease in pressure, they release the hormone renin into the bloodstream.

Regulation of the Digestive System

Regulation of the Digestive System

Digestive activity regulation hinges on three primary components. Activation is prompted by a multitude of mechanical and chemical indicators, primarily detected by receptors within the stomach and intestines' walls. These receptors predominantly respond to factors such as mechanical stretching of the organ walls, changes in pH and osmolarity, and the presence of digesting materials and their by-products.
The effectors in this regulation system are glands and smooth muscles. Activation of these...

Neural Regulation

Neural Regulation

Digestion begins with a cephalic phase that prepares the digestive system to receive food. When our brain processes visual or olfactory information about food, it triggers impulses in the cranial nerves innervating the salivary glands and stomach to prepare for food.

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Related Experiment Video

Updated: Jul 14, 2026

Control of Eating Behavior Using a Novel Feedback System

Control of Eating Behavior Using a Novel Feedback System

Published on: May 8, 2018

Appetite regulation: an overview.

Waljit S Dhillo¹

¹Department of Metabolic Medicine, Hammersmith Hospital, Imperial College London, London, United Kingdom. w.dhillo@imperial.ac.uk

Thyroid : Official Journal of the American Thyroid Association

|June 5, 2007

Summary

Obesity is a growing global health crisis. This review details brain regions and circulating factors, like hypothalamic peptides and gut hormones, that regulate appetite, offering targets for new obesity drugs.

Area of Science:

Neuroscience
Endocrinology
Public Health

Background:

Obesity is a significant and increasing global public health concern linked to severe morbidity and mortality.
Appetite regulation involves complex interactions between the brain and peripheral signals.

Purpose of the Study:

To review key brain regions and circulating factors involved in appetite control.
To highlight recent advancements in understanding appetite regulation for potential anti-obesity drug development.

Main Methods:

Literature review focusing on neurobiological and endocrine mechanisms of appetite regulation.
Analysis of hypothalamic and peripheral signaling pathways influencing food intake.

Main Results:

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The hypothalamus, particularly the arcuate and lateral nuclei, plays a critical role via orexigenic and anorectic peptides.

Peripheral factors including hormones (leptin, insulin, gut hormones) and nutrients signal to the brain to modulate appetite.

Emerging factors like endocannabinoids and specific protein kinases are also implicated in appetite control.

Conclusions:

Understanding the intricate neural and hormonal pathways of appetite regulation is crucial for combating the obesity epidemic.
This knowledge provides a foundation for designing novel therapeutic strategies targeting appetite control mechanisms.