Taste

1
Taste

• Taste Qualities

2
Taste

• The papillae of the tongue
• Four types
• 1) Filiform entire surface no taste buds
• 2) Fungiform tip and sides
• 3) Foliate sides
• 4) circumvallate back

3
Taste

• The taste bud. All papillae except filiform
  contain taste buds (n10,000). No buds in the
  center of the tongue. Bud is a cluster of taste
  cells.

4
Taste

• The taste receptor sites. These are at the top
  of the taste cell. Substances depolarize the
  membrane.

5
Taste

• CNS Pathways

6
Taste

• Four Basic Taste Qualities
• Salty
• Sour (Hydrochloric Acid)
• Bitter (Quinine)
• Sweet (Sugar, Aspartame)
• Some flavors have combinations e.g. Potassium
  Chloride has salty and bitter components

7
Taste

• Genetic Differences in Receptor Density likely
  result in differences in sensitivity to tastes.
  There are a class of substances that are tasted
  by some and not others. Phenylthiocarbamide (PTC)
  is a substance that approx 30 of us cannot
  taste. Those who taste PTC also taste bitterness
  in caffeine and saccharin. A substance with the
  acronym PROP shows similar results. Taste buds of
  a PROP taster on the left and non-PROP taster on
  the right.

8
Taste

• Taste and Smell produce Flavor. Percent correctly
  recognizing smell with nostrils open (solid) or
  closed (shaded)

9
Taste

• Brain Processing of Flavor

10
Taste

• Taste Qualities