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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...
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,...
Pyloric Obstruction01:11

Pyloric Obstruction

Pyloric obstruction, also referred to as gastric outlet obstruction, is a condition characterized by narrowing or blockage at the pylorus—the muscular valve regulating the flow of stomach contents into the duodenum. When this passage becomes impaired, the stomach cannot effectively empty its contents into the small intestine. This disruption leads to a range of gastrointestinal symptoms, including early satiety, bloating, epigastric pain, postprandial nausea, persistent vomiting, and...
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.
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...

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Related Experiment Video

Updated: Jun 8, 2026

Roux-en-Y Gastric Bypass Operation in Rats
07:37

Roux-en-Y Gastric Bypass Operation in Rats

Published on: June 11, 2012

Decrease in sweet taste in rats after gastric bypass surgery.

David S Tichansky1, A Rebecca Glatt, Atul K Madan

  • 1Department of Surgery, Thomas Jefferson University, 1100 Walnut Street, 5th Floor, Philadelphia, PA 19107, USA. David.Tichansky@jefferson.edu

Surgical Endoscopy
|September 17, 2010
PubMed
Summary
This summary is machine-generated.

Roux-en-Y gastric bypass (RYGB) surgery in rats reduced their preference for high-sugar solutions. This suggests RYGB surgery alters sweet taste behavior, impacting food preferences post-operation.

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Last Updated: Jun 8, 2026

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Area of Science:

  • Physiology
  • Neuroscience
  • Bariatric Surgery

Background:

  • Roux-en-Y gastric bypass (RYGB) surgery is known to alter taste and food preferences in humans, particularly for carbohydrate-rich foods.
  • Existing literature suggests a link between RYGB and changes in taste perception and dietary choices.

Purpose of the Study:

  • To investigate the effects of RYGB surgery on sweet taste behavior.
  • To test the hypothesis that RYGB influences sweet taste sensitivity and preference using a rat model.

Main Methods:

  • Male Sprague-Dawley rats underwent either RYGB or sham surgery.
  • Four weeks post-surgery, rats were subjected to brief-access lick tests with varying sucrose concentrations to assess sweet taste behavior.

Main Results:

  • Rats that underwent RYGB surgery exhibited significant weight loss over the 5-week postoperative period, unlike sham-operated controls.
  • RYGB rats demonstrated a significant reduction in licks at high sucrose concentrations (0.25-1.0 mol/l) compared to controls.
  • No significant changes in licking behavior were observed for low sucrose concentrations or water in RYGB rats.

Conclusions:

  • RYGB surgery significantly alters sweet taste behavior in rats, leading to reduced sensitivity or avidity for sucrose.
  • These findings in a rat model mirror human observations of altered sweet taste perception and preferences for high-caloric foods following RYGB surgery.