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Related Concept Videos

Regulation of Food Intake01:30

Regulation of Food Intake

220
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...
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Primary Motives: Hunger and Thirst01:25

Primary Motives: Hunger and Thirst

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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...
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Neural Regulation01:37

Neural Regulation

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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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Hormonal Regulation01:40

Hormonal Regulation

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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.
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Diencephalon: Hypothalamus and Coordination01:23

Diencephalon: Hypothalamus and Coordination

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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.
The hypothalamus interacts with other brain regions, including the pituitary gland, through a direct physical connection called the hypothalamic-pituitary axis. The hypothalamus receives somatic and visceral inputs and...
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Related Experiment Video

Updated: Jun 25, 2025

Measuring Glutathione-induced Feeding Response in Hydra
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Measuring Glutathione-induced Feeding Response in Hydra

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Hunger and satiety: Neuronal dynamics in Hydra behavior.

Thomas W Holstein1

  • 1Centre for Organismal Studies, Heidelberg University, INF 230 Heidelberg, Germany.

Cell Reports
|May 24, 2024
PubMed
Summary

Researchers identified specific neurons that inhibit feeding behaviors in ancient animals lacking a brain. This discovery sheds light on the fundamental neural control of appetite regulation.

Area of Science:

  • Neuroscience
  • Animal Behavior
  • Evolutionary Biology

Background:

  • Appetite regulation in animals is influenced by hormonal and neuronal signals.
  • The evolutionary origins of feeding control mechanisms remain incompletely understood.
  • Previous research focused on brain-centric control, leaving non-brained organisms unexplored.

Purpose of the Study:

  • To investigate the neural basis of feeding inhibition in animals without a centralized brain.
  • To identify specific neurons involved in controlling appetite in primitive organisms.

Main Methods:

  • Utilized genetic and electrophysiological techniques in ancient animal models.
  • Focused on identifying neuronal circuits responsible for satiety signals.
Keywords:
CP: Neuroscience

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Related Experiment Videos

Last Updated: Jun 25, 2025

Measuring Glutathione-induced Feeding Response in Hydra
08:10

Measuring Glutathione-induced Feeding Response in Hydra

Published on: November 16, 2014

11.3K
Generation and Long-term Maintenance of Nerve-free Hydra
06:33

Generation and Long-term Maintenance of Nerve-free Hydra

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Aplysia Ganglia Preparation for Electrophysiological and Molecular Analyses of Single Neurons
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Main Results:

  • Identified specific neurons that actively inhibit feeding behaviors.
  • Demonstrated that these neurons function independently of a brain structure.
  • These findings suggest ancient mechanisms for appetite control.

Conclusions:

  • Specific neurons can inhibit feeding even in the absence of a brain.
  • This research provides insights into the evolution of appetite regulation.
  • Highlights conserved neural pathways for controlling feeding behavior.