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A taste receptor is a type of receptor which facilitates the sensation of taste. When food or other substances enter the mouth, molecules interact with saliva and are bound to taste receptors in the oral cavity and other locations. Molecules which give a sensation of taste are considered sapid.he TAS1R2 + TAS1R3 heterodimer receptor functions as the sweet receptor by binding to a wide variety of sugars and sugar substitutes. TAS1R2+3 expressing cells are found in circumvallate papillae and foliate papillae near the back of the tongue and palate taste receptor cells in the roof of the mouth.
Sensory Basis of Taste (Gustation). The sensory receptors for taste, known more technically as gustation, are taste buds located on the tongue, mouth and larynx. Taste buds on the tongue are located within papillae-those little visible bumps that form the ridges and valleys on the tongue's surface.aste buds, the main receptor for taste stimuli, are located in the papillae scattered throughout the mouth. They are so small that they are visible only with a microscope. A person's tongue has about 10,000 taste buds. The number of taste buds a person has decreases with age, especially after 65 or so.