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Related Concept Videos

The Physiology of Taste01:24

The Physiology of Taste

The perception of a salty flavor is facilitated by sodium ions within the oral salivary fluid. Upon consumption of a salty substance, salt crystals disassemble, leading to the liberation of its constituents—Na+ and Cl- ions. These ions subsequently dissolve into the salivary fluid present in the oral cavity. The external environment of the gustatory cells experiences an elevation in Na+ concentration, thereby establishing a potent concentration gradient. This gradient propels the diffusion of...
Gustation01:43

Gustation

Gustation is a chemical sense that, along with olfaction (smell), contributes to our perception of taste. It starts with the activation of receptors by chemical compounds (tastants) dissolved in the saliva. The saliva and filiform papillae on the tongue distribute the tastants and increase their exposure to the taste receptors.
Taste Buds and Receptors01:20

Taste Buds and Receptors

Gustation, or the sense of taste, is intrinsically linked to the anatomical structures located on the tongue. This organ's surface, along with the entirety of the oral cavity, is adorned with stratified squamous epithelium. Evident on the tongue are elevated structures known as papillae (singular = papilla), which house the mechanisms for the transduction of gustatory stimuli. Four distinct types of papillae exist, each identified by their unique morphological attributes: the circumvallate,...
Neural Regulation01:37

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.
Tactile and Chemical Senses01:27

Tactile and Chemical Senses

Tactile senses encompass touch, temperature, and pain, each mediated by specific receptors. Touch receptors detect mechanical energy or pressure against the skin. Sensory fibers from these receptors enter the spinal cord and relay information to the brain stem. Here, most fibers cross over to the opposite side of the brain. The touch information then moves to the thalamus, which projects a map of the body's surface onto the somatosensory areas of the parietal lobes in the cerebral cortex. This...
G-Protein Gated Ion Channels01:21

G-Protein Gated Ion Channels

GPCRs are primarily responsible for our sense of smell, taste, and vision.  The binding of a sensory stimulus activates GPCR to stimulate effector proteins, many of which are ion channels in the sensory organs. GPCRs modulate the opening and closing of the target ion channels either directly by binding them, or by releasing second messengers that activate these channels. As ions move across the membrane, the membrane potential is altered, which induces an appropriate response.
Sensory organs,...

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Related Experiment Video

Updated: Jun 2, 2026

Real-time Analysis of Gut-brain Neural Communication: Cortex wide Calcium Dynamics in Response to Intestinal Glucose Stimulation
07:29

Real-time Analysis of Gut-brain Neural Communication: Cortex wide Calcium Dynamics in Response to Intestinal Glucose Stimulation

Published on: December 29, 2023

Sensing via intestinal sweet taste pathways.

Richard L Young1

  • 1Discipline of Medicine, School of Medicine, University of Adelaide Adelaide, SA, Australia.

Frontiers in Neuroscience
|April 27, 2011
PubMed
Summary

Nutrient detection in the gut, particularly sweet taste signaling, influences digestion and metabolism. Understanding intestinal sweet taste receptors is key to controlling gut functions like motility and nutrient absorption.

Keywords:
carbohydrate absorptiongastric emptyingglucose sensingsmall intestinesweet taste moleculesvagal afferents

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Last Updated: Jun 2, 2026

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07:10

Taste Exam: A Brief and Validated Test

Published on: August 17, 2018

Area of Science:

  • Gastroenterology
  • Molecular Biology
  • Neuroscience

Background:

  • Nutrient detection in the gastrointestinal (GI) tract is crucial for regulating motility, glycemia, and energy intake.
  • Mechanisms of lingual taste detection are well-understood, providing a model for intestinal nutrient sensing.
  • Intestinal nutrient sensing mechanisms remain largely uncharacterized.

Purpose of the Study:

  • To review the form and function of sweet taste transduction mechanisms in the intestinal tract.
  • To identify intestinal cell types expressing sweet taste receptors in animals and humans.
  • To explore how nutrient presence is signaled to neural pathways controlling GI motility.

Main Methods:

  • Literature review focusing on sweet taste transduction in the intestine.
  • Analysis of studies on intestinal cell types expressing taste receptors.
  • Examination of signaling pathways linking nutrient detection to neural control of GI motility.

Main Results:

  • Sweet taste transduction molecules are present in various intestinal cell types in both animals and humans.
  • These receptors are strategically located to detect intraluminal nutrients.
  • Evidence suggests these sweet taste signals are transduced to neural pathways regulating GI function.

Conclusions:

  • Sweet taste receptors play a significant role in intestinal nutrient sensing.
  • Understanding these mechanisms can elucidate the control of GI motility, glycemia, and energy balance.
  • Further research is needed to fully characterize the role of intestinal sweet taste signaling.