Lecture8 - Special Senses II

Lecture8 - Special Senses II - Special Senses II Taste...

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Special Senses II Taste Molecules of food stimulate taste buds - Taste Papillae: seen as little red dots or raise bumps o Raise protrusions of the tongue surface o Four types of papillae in the human tongue Fungiform Filiform Foliate Vallate Papillae o Cells: Supporting Cells: contain microvili, appear to secrete substances into lumen of taste bud Sensor receptor cell: peg like extensions projecting into lumen, contain the sites of sensory transduction Basal Cells: differentiate into new receptor cells, the cells are continuously renewed every 10 days or so - Taste Buds o Embedded in Papillae o Taste Sensory Organs o Sense Five tastes: salt, sour, sweet, bitter, and umami o A single bud contains 50-100 taste cells representing all 5 sensations A pore that opens out to the surface of the tongue enabling molecules and ions taken into the mouth Each taste cell has taste receptors on it’s surface Base of a taste bud has taste nerve axons Each taste receptor cell is connected through an ATP-releasing synapse to a sensory
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This note was uploaded on 04/06/2008 for the course BMVS 4064 taught by Professor Dr.lee during the Spring '08 term at Virginia Tech.

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Lecture8 - Special Senses II - Special Senses II Taste...

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