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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.
Conditioned Taste Aversion01:14

Conditioned Taste Aversion

Conditioned taste aversion, also known as sauce béarnaise syndrome, is a phenomenon in which an individual develops an aversion to a certain food taste following a negative experience, typically illness. This form of aversion is a type of classical conditioning in which the taste of the food (conditioned stimulus, CS) is associated with the experience of illness (unconditioned stimulus, UCS).
A notable characteristic of conditioned taste aversion is that it often requires only a single exposure...
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,...
Responses to Salt Stress02:02

Responses to Salt Stress

Salt stress—which can be triggered by high salt concentrations in a plant’s environment—can significantly affect plant growth and crop production by influencing photosynthesis and the absorption of water and nutrients.
Regulation of Water Intake01:25

Regulation of Water Intake

Osmolality refers to the number of solute particles per kilogram of solvent in a solution. Plasma osmolality specifically indicates the total number of solute particles per kilogram of water in blood plasma. This value reflects the body's hydration status and is tightly regulated through mechanisms controlling water intake and output. While water consumption is a conscious decision, the body has intrinsic regulatory systems to maintain fluid balance. Dehydration, a state of water deficit...

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Related Experiment Video

Updated: May 14, 2026

Taste Exam: A Brief and Validated Test
07:10

Taste Exam: A Brief and Validated Test

Published on: August 17, 2018

High salt recruits aversive taste pathways.

Yuki Oka1, Matthew Butnaru, Lars von Buchholtz

  • 1Howard Hughes Medical Institute and Department of Biochemistry and Molecular Biophysics, Columbia College of Physicians and Surgeons, Columbia University, New York, New York 10032, USA.

Nature
|February 15, 2013
PubMed
Summary

High salt concentrations trigger aversion by activating sour and bitter taste pathways. Silencing these pathways removes salt aversion but preserves attraction, highlighting their role in preventing excessive salt intake.

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Related Experiment Videos

Last Updated: May 14, 2026

Taste Exam: A Brief and Validated Test
07:10

Taste Exam: A Brief and Validated Test

Published on: August 17, 2018

Psychophysical Tracking Method to Measure Taste Preferences in Children and Adults
09:17

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Published on: July 16, 2016

Whole-Mount Staining, Visualization, and Analysis of Fungiform, Circumvallate, and Palate Taste Buds
07:40

Whole-Mount Staining, Visualization, and Analysis of Fungiform, Circumvallate, and Palate Taste Buds

Published on: February 11, 2021

Area of Science:

  • Neuroscience
  • Sensory Biology
  • Physiology

Background:

  • Taste receptor cells detect five basic tastes: sweet, sour, bitter, umami, and salt.
  • While sweet and umami are appetitive, bitter and sour are aversive.
  • Salt taste is unique, transitioning from appetitive to aversive with increasing concentration, crucial for homeostasis.

Purpose of the Study:

  • To investigate the cellular and molecular mechanisms underlying salt aversion.
  • To identify the taste pathways responsible for rejecting high salt concentrations.

Main Methods:

  • Examined the activation of sour- and bitter-taste-sensing cells by high salt concentrations.
  • Utilized genetic silencing techniques to assess the role of these pathways in salt aversion behavior.
  • Evaluated the effect of pathway silencing on salt attraction.

Main Results:

  • High salt concentrations activate both sour- and bitter-taste pathways.
  • Genetic silencing of these aversive pathways abolished behavioral aversion to concentrated salt.
  • Mice lacking salt aversion pathways exhibited continuous attraction to high salt concentrations without impaired salt attraction.

Conclusions:

  • The primary aversive taste pathways (sour and bitter) are recruited to mediate salt aversion.
  • These pathways are essential for behavioral rejection of high salt concentrations.
  • Evolutionary 'co-opting' of these pathways ensures avoidance of potentially harmful salt levels.