Special Senses (Gustatory)

Question 1

The Receptors of Gustatory Sense is

Answer 1

taste buds

Question 2

➢ Most are localized in the tongue
➢ A few are found on the soft palate, inner surface of the cheeks, walls of oropharynx
➢ Cylindrical ____________ is composed of many sensory gustatory cells that are encapsulated by supporting cells
➢ Are found on the sides of the circumvallate and on the more numerous fungiform papilla

Answer 2

Taste Buds

Question 3

➢ Opening in the taste buds where the gustatory hairs (sensitive portion of receptor cell) pass through
➢ Dorsal surface of tongue is covered with small peg-like projections or papillae

Answer 3

Taste Pore

Question 4

Four types of Papillae

Answer 4

• Circumvallate – with taste buds
• Fungiform – with taste buds
• Foliate – with taste buds
• Filliform – contains only gustatory cells

Question 5

Taste buds on the anterior 2/3 of the tongue are innervated by the

Answer 5

facial nerve (CN VII)

Question 6

Taste buds on the posterior 1/3 of the tongue innervated by

Answer 6

glossopharyngeal nerve (CN IX)

Question 7

Taste buds on the soft palate and the oropharynx are supplied by the

Answer 7

vagus nerve

Question 8

4 basic modalities of taste are sensed acutely In particular regions of the tongue

Answer 8

• Sweet – tip of tongue
• Bitter – back of tongue
• Salty – over most of the tongue
• Sour – sides of tongue

Question 9

➢ respond to substances such as sugars, saccharine, and some amino acids

Answer 9

Sweet Receptors

Question 10

➢ respond to alkaloids

Answer 10

Bitter Receptors

Question 11

➢ respond to metal ions in solution

Answer 11

Salty Receptors

Question 12

➢ respond to hydrogen ions (h+), or the acidity of the solution

Answer 12

Sour Receptors

Question 13

area located in the opercular part of the post central gyrus (Brodmann’s Area 43)

Answer 13

Termination of the gustatory pathway

Question 14

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Answer 14

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