Outline8 - 1 Outline 8: The Chemical Senses: Taste &...

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Unformatted text preview: 1 Outline 8: The Chemical Senses: Taste & Smell I. Taste A. Taste- refers to stimulation of the taste receptor cells on taste buds Not to be confused with flavor- a combination of taste and smell B. Taste buds-located in papillae on the surface of the tongue Each taste bud contains about 50+ receptor cells Neurons carrying taste information receive input from numerous receptor cells In adult humans, taste buds predominate along the outside of the edge of the tongue with only a very few in the enter. However, the taste map found in many textbooks is now considered misleading **Try this at home-use a cotton swab to apply sugar water, salt water or vinegar to different parts of the tongue** C. Four (or Five) Primary Taste Receptor types The 4 primaries: sweet, sour, salty and bitter (the 5th: umami) Evidence that the 4 primaries are distinct taste receptors: 1. Chemicals can alter the response to one type of taste (e.g., sweetness) without affecting other types of taste. This suggests distinct receptors are affected. 2. Each taste type shows a distinct adaptation effect and does not show cross- adaptation Try this at home- soak your tongue in vinegar for 15 seconds. Try tasting something sour (lemon juice) vs sweet (sugar water) 2...
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This note was uploaded on 04/20/2008 for the course PSY 308 taught by Professor Jones during the Spring '08 term at University of Texas at Austin.

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Outline8 - 1 Outline 8: The Chemical Senses: Taste &...

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