Bisc 130 Oral Cavity And Pharynx Iv

Front 1

What are the borders of the oral vestibule?

Back 1

External: lips and cheeks
Internal: gums and teeth

Front 2

What is the vermillion zone on the lips?

Back 2

The transition between skin (outer) and mucous membrane (inner)

Front 3

What is the significance of the vermillion zone (clinically)?

Back 3

People exposed to carcinogens often have leukoplakia (precancerous lesions) in this zone (where cells change)

Front 4

The hard palate is the bony/muscular portion and the soft palate is the bony/muscular portion.

Back 4

Bony; muscular

Front 5

What makes up the hard palate?

Back 5

Palatine process of the maxilla and horizontal plate of the palatine bone

Front 6

What two muscles are found in the soft palate? What are their functions?

Back 6

1. Tensor veli palatini (tense soft palate)
2. Levator veli palatini (elevate soft palate)

Front 7

True or false: The uvula is a midline projection from the hard palate.

Back 7

False; soft palate

Front 8

The teeth are housed in the _______ processes of the mandible and maxilla.

Back 8

Alveolar

Front 9

How many deciduous teeth does the skull generally contain?

Back 9

Twenty (including 4 incisors, 2 canines, and 4 molars)

Front 10

How many permanent teeth does the skull generally contain?

Back 10

32 (including 4 incisors, 2 canines, 4 premolars and 6 molars)

Front 11

True or false: The tongue muscle forms the floor of the oral cavity.

Back 11

False: the mylohyoid muscles

Front 12

What is the sulcus terminalis?

Back 12

Located on the dorsal surface of the tongue; divides the anterior 2/3 from the posterior 1/3

Front 13

Where are the three types of papillae located on the tongue?

Back 13

1. Vallate papillae: large, circular, 8-12; located just ant. to sulcus terminalis
2. Fungiform papillae: numerous, deep red; located mostly on sides and apex of tongue
3. Filliform papillae: minute, conical; located over ant. 2/3 of tongue

Front 14

What nerves innervate the taste buds?

Back 14

1. Facial nerve (CN 7): ant. 2/3 of tongue
2. Glossopharyngeal nerve (CN 9): post. 1/3 of tongue
3. CN 10 (Vagus) on epiglottis

Front 15

True or false: The glossopharyngeal nerve innervates the extrinsic and intrinsic muscles of the tongue.

Back 15

False; hypoglossal nerve (CN 12)

Front 16

What are the actions of the following tongue muscles? Are they intrinsic or extrinsic?
1. Genioglossus
2. Hyoglossus
3. Styloglossus

Back 16

Extrinsic

Genioglossus: protrude tongue
Hyoglossus: depress tongue
Styloglossus: retract/elevate tongue (swallowing)

Front 17

What do the various intrinsic muscles of the tongue do?

Back 17

Change the shape of the tongue

Front 18

What are the blood vessels to the tongue?

Back 18

1. Lingual artery
2. Lingual veins

Front 19

Where do the lingual veins drain to?

Back 19

Internal jugular

Front 20

What are the three salivary glands in the oral cavity and where are they located (generally)?

Back 20

1. Parotid (subcutaneous, ant. to ear)
2. Submandibular (below mylohyoid line)
3. Sublingual (above mylohyoid line)

Front 21

What does the parotid gland produce and where does it secrete to?

Back 21

Mostly serous fluid secreted through a duct that opens opposite the 2nd upper molar (along buccal mucosa)

Front 22

What does the submandibular gland produce and where does it secrete to?

Back 22

Mostly serous, some mucous through one duct that opens below the tongue

Front 23

What does the sublingual gland produce and where does it secrete to?

Back 23

Mostly mucous, some serous that is secreted through several ducts opening below the tongue and another duct opening into the submandibular duct

Front 24

What are fauces?

Back 24

Aperatures that open into the pharynx

Front 25

Where are the superior, inferior and lateral fauces located?

Back 25

1. Superior: soft palate
2. Inferior: tongue
3. Lateral: palatoglossal arches

Front 26

True or false: The pharynx is exclusively used by the digestive system.

Back 26

False, digestive and respiratory

Front 27

Where is the nasopharynx located?

Back 27

Posterior to the nasal choanae, superior to the soft palate

Front 28

What four important structures are located in the nasopharynx?

Back 28

1. Auditory (eustachian)tube
2. Torus tubarius
3. Salpingopharyngeal fold
4. Pharyngeal tonsils

Front 29

What is the function of the auditory tube? What surrrounds its opening?

Back 29

The torus tubaris is a swelling around the auditory tube opening; the auditory tube equilibrates pressure between the middle ear and the outside

Front 30

What is contained in the salpingopharyngeal folds?

Back 30

Salpingopharyngeal muscle

Front 31

Where is the oropharynx located?

Back 31

Posterior to the fauces, inferior to the soft palate

Front 32

What important structure is in the lateral wall of the oropharynx?

Back 32

Palatine tonsil

Front 33

Where is the laryngopharynx?

Back 33

From the epiglottis to the cricoid cartilage

Front 34

What do the sup, middle, and inf constrictor muscles do?

Back 34

Constrict/decrease the volume of the pharynx (swallowing)

Front 35

What three muscles elevate the pharynx?

Back 35

Palatopharyngeus, salpingopharyngeus, and stylopharyngeus

Front 36

The pharyngeal plexus of CN 10 (vagus) innervates all the muscles of the pharynx except:

Back 36

The stylopharyngeus (CN 9)

Front 37

What nerve is responsible for sensory innervation of the pharynx?

Back 37

CN 9

Front 38

The gag reflex is innervated by CN 9/10.

Back 38

CN 9

Front 39

What three arteries supply the pharynx? What do they branch from?

Back 39

1. Ascending pharyngeal (ext. carotid)
2. Sup. thyroid (ext. carotid)
3. Inf. thyroid (thyrocervical trunk of subclavian)

Front 40

Where do the veins of the pharynx drain into?

Back 40

Internal jugular vein