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Chapter 17
Gustation
12
Anatomy
Undergraduate 1
05/13/2008

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Term
Types of Taste Buds
Definition

Fungiform

Circumvallate

Folliate

Term
Taste Buds
Definition

Composed 50 -100 taste cells

Surrounded by supporting cells

Stimulus=Chemicals

Term
Basal Cells
Definition

Taste Cell Stem Cells

They divide to produce daughter cells.

Term
Four Primary Taste Sensations
Definition

Sweet

Sour

Salty

Bitter

Term
UMAMI
Definition

Receptors sensitive to amino acids

pleasant taste of chicken broth and parmesean cheese.

Term
Water Taste Bud?
Definition

Type of Taste receptor

Located in the Pharynx

Minor reduction in ADH secretions occur.

Term
CN VII (Facial)
Definition

Part of the Gustatory Pathways

Taste anterior 2/3s of tongue

Fungiform taste buds

Term

CN IX

Glossopharyngeal

Definition

Part of the Gustatory Pathways

Posterior 1/3 of tongue

Folliate and Circumvallate

Term

CN X

Vagus

Definition

Part of the Gustatory Pathways

Epiglottis and Pharynx

CN synapses to medulla oblongata

Term
Direct Depolarization
Definition

Tastant Triggers cation channels

Cations enter cell

Results in Depolarization

Term
Second Messenger Depolarization
Definition

Tastant binds to receptor

Receptor binds to G-protein

G-protein activates second messengers

Second messengers open ion channels

Ion flux causes Depolarization

Term
Salt and sour receptors
Definition
They are chemically gated ion channels whose stimulations produce depolarization of the cell, unlike the other (g-proteins) who release neurotransmitter.
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