Section 1D Flashcards Preview

Digestion > Section 1D > Flashcards

Flashcards in Section 1D Deck (18)
Loading flashcards...
0
Q

Where is Fungiform papillae most abundant?

A

At its tip and along its anterior sides

1
Q

Behavioral evidence suggests that taste discriminations represent what 4 or 5 primary taste qualities

A
  1. Salty (sodium choloride NaCl)
  2. Sweet (Sucrose)
  3. Sour (Hydrochloric or Citric Acid)
  4. Bitter (Quinine hydrochloric acid)
  5. Umami (glutamate; MSG)
2
Q

Fungiform papillae taste buds mainly respond to what tastes?

A

Sweet and Salty

Also Sour

3
Q

Foliate papillae respond to what tastes?

A

Sour

4
Q

Where are Foliate papillae found?

A

most abundant on middle edges of tongue

5
Q

What papillae are the largest and least numerous?

A

Circumvallate

6
Q

Circumvallate papillae respond to what tastes?

A

Bitter

7
Q

Taste buds in the region of the epiglottis are innervated by what nerve?

A

Vagus Nerve (CN X)

8
Q

Taste buds on circumvallate papillae and some of the foliate papillae are innervated by what nerve?

A
Glossopharyngeal nerve (CN IX) 
Basically the posterior 1/3 of the tongue
9
Q

Taste buds in the region of the palate are supplied by what nerve?

A

Facial nerve (CN VII)

10
Q

What cells are found in a taste bud?

A

Taste receptor Cells

Basal cells or Supporting cells

11
Q

T or F, Taste receptor cells are technically neurons themselves.

A

False, They are technically NOT neurons. Taste receptor cells synapse onto afferent nerve endings of CN VII, IX and X

13
Q

What CN’s do taste receptor cells synapse onto?

A

CN VII, IX, X

14
Q

Cranial nerves (afferents) involved in gustatory pathway terminate where

A

Nucleus of the solitary tract or Solitary nucleus located in the brainstem. Specifically the rostral 1/2 of the NST contains the gustatory nuclei.

15
Q

Output from the NST travels to what nucleus?

A

To the ventroposterior medial nucleus of the thalamus which is responsible for communicating with the insula

16
Q

What is the insula or insular cortex?

A

A portion of the cerebral cortex folded deep within lateral sulcus (fissure separating the temporal lobe from parietal and frontal lobe)

17
Q

What nerve supplies sensory innervation to the tongue?

A

Lingual nerve

18
Q

T or F, Lower third molar removal under local anesthesia may cause light lingual sensibility impairment

A

True