Respuesta :
The human sense of taste involves receptors cells that respond to chemicals entering oral cavity basic taste.
Taste receptors are modified elongated epithelial cells that are present on the tongue, tonsils, pharynx, epiglottis, and hard and soft palates throughout the oral cavity. Regional gene expression around taste buds regulates their formation and is in part regulated by innervating nerves.
Taste pores are openings in the epithelium for chemical substances to enter. Peripheral sensory innervation is through branches of three cranial nerves: facial (VII), glossopharyngeal (IX), and vagal (IV) (X). Only three of the four morphologically unique forms of lingual papillae—the fungiform, foliate, and circumvallate papillae—bear taste receptors.
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