Oral Cavity

Question 1

What makes up the posterior boundary of the oral cavity?

Answer 1

oropharyngeal isthmus, demarcated by the palatoglossal arch

Question 2

What are the two parts of the oral cavity?

Answer 2

oral vestibule

oral cavity proper

Question 3

Where does the oral vestibule lie and what two things does it contain?

Answer 3

between the lips and gums, or cheek and gums

contains the labial glands and parotid duct

Question 4

Where does the oral cavity proper lie?

Answer 4

internal to the tooth rows

Question 5

What is the philtrum of the lip?

Answer 5

median groove that externally extends from the nose to the vermilion border of the upper lip

Question 6

What two things does the lip contain?

Answer 6

orbicularis oris muscle and labial glands

Question 7

What two things does the cheeks contain?

Answer 7

buccinator muscle and buccal glands

Question 8

What does the hard palate form?

Answer 8

anterior two thirds of the palate

Question 9

What does the soft palate form?

Answer 9

posterior one third of the palate

Question 10

What are the 3 foramen in the hard palate and what do they transmit?

Answer 10

incisive foramen - transmits naso-palatine nerves

greater and lesser palatine foramen - transmits nerves and vessels

Question 11

What is the hard palate covered by?

Answer 11

mucoperiosteum

Question 12

What is the function of the transverse palatine folds?

Answer 12

aid in gripping food against the tongue during mastication

Question 13

What is the function of the soft palate during swallowing?

Answer 13

elevates to close the opening between the nasopharynx above and the oropharynx below

Question 14

What are the two arches of the soft palate and what do they contain?

Answer 14

palatoglossal arch and they contain palatoglossal fold and muscle
palatopharyngeus arch and they contain palatopharyngeus fold and muscle

Question 15

What is the uvula?

Answer 15

median projection of the soft palate

Question 16

What does the tonsillar fossa contain and where is it located?

Answer 16

located between palatoglossal and palatopharyngeal arches and contains the palatine tonsils (most frequently removed)

Question 17

What is the tonsil that is most frequently removed?

Answer 17

palatine tonsil

Question 18

What is the function of the musculus uvulae?

Answer 18

elevates the uvula

Question 19

What is the function of the levator veli palatini?

Answer 19

elevates the soft palate

Question 20

What is the function of the tensor veli palatini?

Answer 20

tenses soft palate, opens pharyngotympanic tube

Question 21

Which of the following muscle is innervated by the mandibular divison of the trigeminal nerve?
A. tensor veli palatini
B. levator veli palatini
C. musculus uvulae

Answer 21

A. Tensor veli palatini

other two are innervated by the vagus nerve

Question 22

What two muscles make up the floor of the oral cavity?

Answer 22

mylohyoid and geniohyoid muscles

Question 23

What is the innervation of the hard palate?

Answer 23

greater palatine and nasopalatine nerves

Question 24

What are the innervations of the soft palate?

Answer 24

lesser palatine nerve

Question 25

What is the blood supply of the hard palate?

Answer 25

greater palatine artery (from maxillary)

Question 26

What is the blood supply of the soft palate?

Answer 26

lesser palatine and facial arteries

Question 27

What happens to the uvula when you have nerve damage to the left vagus?

Answer 27

the uvula deviates to the right

Question 28

What are the 5 structures that the tongue attaches to by muscles?

Answer 28

``` hyoid bone mandible styloid process palate pharynx ```

Question 29

What are the 4 functions of the tongue?

Answer 29

taste mastication swallowing speech

Question 30

What is a thyroglossal cyst?

Answer 30

occurs when the thyroglossal duct does not obliterate

Question 31

Where is the apex of the tongue?

Answer 31

against incisor teeth

Question 32

Where is the margin of the tongue?

Answer 32

against teeth and gums

Question 33

Where is the dorsum of the tongue?

Answer 33

upper surface of the tongue

Question 34

Where is the inferior surface of the tongue?

Answer 34

lower surface of the tongue

Question 35

Where is the root of the tongue?

Answer 35

attached base of the tongue

Question 36

What does the sulcus terminalis divide the tongue into?

Answer 36

oral part and oropharyngeal part

Question 37

Where do thyroglossal cysts occur?

Answer 37

foramen cecum

Question 38

What are the four lingual papillae?

Answer 38

filiform papillae fungiform papillae vallate papillae foliate papillae

Question 39

``` Which of the following lingual papillae do not contain taste buds? A. Fungiform papillae B. Vallate papillae C. Filiform papillae D. Foliate papillae ```

Answer 39

C. filiform papillae

Question 40

What is the largest of the papillae?

Answer 40

vallate papillae

Question 41

Why is it important for the vallate papillae to sense bitter taste?

Answer 41

can trigger GAG reflex (poison) | survival mechanism

Question 42

Where is the lingual tonsils located?

Answer 42

on the oropharyngeal surface of the tongue

Question 43

What are the two folds that connect the tongue to the epiglottis?

Answer 43

median and lateral glossoepiglottic fold

Question 44

What is the vallecula?

Answer 44

space on either side of the median glossoepiglottic fold

Question 45

What is ankyloglossia?

Answer 45

where an infants frenulum of the tongue is shorter s-i and longer a-p, tongue is strapped to the floor causing speech to be difficult

Question 46

What nerve innervates the intrinsic muscles of the tongue?

Answer 46

hypoglossal nerve

Question 47

``` Which of the following is not an extrinsic muscle of the tongue? A. genioglossus B. hyoglossus C. styloglossus D. sternoglossus E. palatoglossus ```

Answer 47

D. sternoglossus

Question 48

``` Which of the following extrinsic muscles of the tongue is not innervated by the hypoglossal nerve? A. genioglossus B. hyoglossus C. styloglossus D. palatoglossus ```

Answer 48

D. palatoglossus (vagus nerve)

Question 49

What is the function of the palatoglossus?

Answer 49

elevates back of tongue

Question 50

What is the importance of the genioglossus?

Answer 50

pulls the tongue forward and prevents the tongue from falling backwards causing you to suffocate

Question 51

What nerves bring general sensation to the anterior two thirds of the tongue?

Answer 51

lingual nerve | branch of mandibular division of the trigeminal nerve

Question 52

What nerves bring taste to the anterior two thirds of the tongue?

Answer 52

chorda tympani | branch of the facial nerve

Question 53

What is the innervation of the epiglottis?

Answer 53

vagus nerve

Question 54

What nerve brings general sensation and taste to the posterior one third of the tongue?

Answer 54

glossopharyngeal nerve

Question 55

What is the artery and vein to the tongue?

Answer 55

lingual artery and vein

Question 56

What are the 3 lymph nodes associated with the tongue?

Answer 56

submental, submandibular, deep cervical nodes

Question 57

Eventually, what node does all the lymph of the tongue drain to?

Answer 57

deep cervical node