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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...
Glucose Homeostasis: Regulation of Blood Glucose01:02

Glucose Homeostasis: Regulation of Blood Glucose

Carbohydrates consumed through foods are converted into glucose, a crucial energy source for the body. In the prandial state, high blood glucose levels stimulate the secretion of insulin from the pancreas. Insulin inhibits hepatic glucose production and stimulates glucose uptake and metabolism by muscle and adipose tissue. The excess glucose is converted into glycogen and stored in the liver and muscles.
During fasting, when blood glucose levels are low, the pancreas secretes glucagon. it...
Glucose Homeostasis: Pancreatic Islets and Insulin Secretion01:27

Glucose Homeostasis: Pancreatic Islets and Insulin Secretion

The pancreatic islets comprising only 1%-2% of the volume are highly vascularized and innervated mini-organs. They contain five endocrine cell types, including β cells that secrete insulin, which is synthesized as a single polypeptide chain, preproinsulin, processed to proinsulin, and finally to insulin and C-peptide. This process is complex and regulated, involving the Golgi complex, the endoplasmic reticulum, and the secretory granules of the β cell.
Insulin and C-peptide are co-secreted in...
Hormones Regulating Blood Glucose01:16

Hormones Regulating Blood Glucose

Insulin is released by beta cells of the pancreas when blood glucose levels are high. It facilitates glucose absorption and utilization in insulin-dependent cells with insulin receptors on their plasma membranes. Insulin promotes glucose uptake by increasing the number of glucose transport proteins in the cell membrane, allowing glucose to enter the cell. As a result, glucose utilization and ATP production are enhanced.
In addition to accelerating glucose uptake and utilization, insulin has...
Diencephalon: Hypothalamus and Coordination01:23

Diencephalon: Hypothalamus and Coordination

The hypothalamus is a small yet highly complex and essential brain region that plays a crucial role in regulating various bodily functions. Anatomically, it is located at the base of the brain, just above the brainstem and below the thalamus, forming part of the limbic system.
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Feedback Loops01:01

Feedback Loops

In most cases, excessive hormone production is prevented by negative feedback—a loop that starts with a stimulus inducing the release of a particular substance, like a hormone, to maintain a certain level before triggering a signal that results in a decrease in further release of the hormone.

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Updated: Jun 7, 2026

Membrane Potential Dye Imaging of Ventromedial Hypothalamus Neurons From Adult Mice to Study Glucose Sensing
11:10

Membrane Potential Dye Imaging of Ventromedial Hypothalamus Neurons From Adult Mice to Study Glucose Sensing

Published on: November 27, 2013

Multiple hypothalamic circuits sense and regulate glucose levels.

Mahesh Karnani1, Denis Burdakov

  • 1Dept. of Pharmacology, Univ. of Cambridge, UK.

American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
|November 5, 2010
PubMed
Summary
This summary is machine-generated.

Hypothalamic neurons sense body energy levels using glucose. Recent studies reveal orexin/hypocretin and SF-1/glutamate neurons coordinate blood glucose, influencing feeding and behavior.

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Membrane Potential Dye Imaging of Ventromedial Hypothalamus Neurons From Adult Mice to Study Glucose Sensing
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Live Images of GLUT4 Protein Trafficking in Mouse Primary Hypothalamic Neurons Using Deconvolution Microscopy
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Area of Science:

  • Neuroscience
  • Metabolism
  • Endocrinology

Background:

  • The hypothalamus regulates energy balance via specialized glucose-sensing neurons.
  • Understanding the neurochemical identities and functions of these neurons is crucial for metabolic health.

Purpose of the Study:

  • To review recent advancements in identifying hypothalamic glucose-sensing neurons.
  • To elucidate the physiological significance and functional definitions of glucose sensing.
  • To propose a model for hypothalamic glucose homeostasis and its link to behavior.

Main Methods:

  • Literature review of recent research on hypothalamic glucose sensing.
  • Analysis of neurochemical identities and physiological roles of specific neuronal populations.
  • Integration of data from various experimental techniques.

Main Results:

  • Hypothalamic orexin/hypocretin neurons exhibit adaptive glucose sensing, responding to changes rather than absolute levels.
  • Melanin-concentrating hormone, neuropeptide Y, and proopiomelanocortin neurons also possess glucose-sensing capabilities.
  • Steroidogenic factor-1 (SF-1)/glutamate neurons in the ventromedial hypothalamus play a role in glucose homeostasis.
  • A cooperative model involving orexin/hypocretin and SF-1/glutamate neurons in sympathetic outflow to the liver and pancreas is proposed.

Conclusions:

  • Glucose sensing in distinct hypothalamic circuits coordinates autonomic adjustments with higher brain functions and behavior.
  • Orexin/hypocretin neurons link glucose sensing to feeding, reward, hunger, and stress responses.
  • Further research is needed to refine definitions of glucose sensing and reconcile findings across different experimental approaches.