wk 13, lec 2

Question 1

what is the upper nasal cavity boundary

Answer 1

cribriform plate of ethmoid bone

Question 2

perforations in the cribriform plate allow for

Answer 2

CN I (olfactory nerve) to pass through

Question 3

lower boundary of nasal cavity

Answer 3

hard palate

Question 4

hard palate purpose

Answer 4

o For airflow during breathing and prevents food from entering nasal cavity when swallowing

Question 5

choanae connects

Answer 5

nasal cavity to nasopharyn

Question 6

choanae allows for

Answer 6

o Path for airflow to respiratory tract

Question 7

nasal septum

Answer 7

divides nasal cavity into left and right passages

Question 8

nasal conchae are for

Answer 8

o High vascularize mucosa for conditioning inhaled air
o Amplify surface area, induce air turbulence, humidification, filtration, olfactory role

Question 9

meatuses in the nose for

Answer 9

narrow air passages between nasal conchae and lateral walls of nasal cavity

Question 10

superior meatus allow for

Answer 10

 Airflow to olfactory region for odor detection

Question 11

middle meatus allows for

Answer 11

 Hiatus semilunaris to drain frontal and maxillary sinus
 Sinus drainage and ventilation

Question 12

where is the ethmoidal bulla found and what’s it for

Answer 12

in middle meatus and it houses the ethmoidal air cells

Question 13

inferior meatus to

Answer 13

 Maintain moisture in nasal cavity

Question 14

where is the nasolacrimal duct found and its function

Answer 14

inferior meatus and its for – drain tears from lacrimal sac to nasal cavity (nose runs when cry)

Question 15

what type of cells and membrane line the nasal cavity

Answer 15

• Nasal cavity lined with specialized mucous membrane
  o Ciliated columnar epithelium for olfaction of superior concha

Question 16

paranasal sinuses

Answer 16

o Communicate with nasal cavity via small openings (ostia)

o Lined by mucous membrane + ciliated epithelial layer

Question 17

what do paranasal sinuses allow for

Answer 17

o Allows for communication between sinuses and nasal cavity

 Reduce weight of skull and serve as resonant chambers contributing to vocal resonance

Question 18

frontal sinus drains into

Answer 18

• frontal sinus, which empties into the anterior part of the hiatus semilunaris through the infundibulum.

Question 19

maxillary sinus and anterior and middle ethmoidal sinuses drain into

Answer 19

• The maxillary sinus and the anterior and middle ethmoidal sinuses also drain into the hiatus semilunaris.

Question 20

oisteruri ethmoidal sisneus drain into

Answer 20

• superior meatus receives drainage from the posterior ethmoidal sinuses.

Question 21

sphenoid sinus drains into

Answer 21

• The sphenoid sinus drains into a recess above the superior concha.

Question 22

anterior middle and posterior ethmoidal sinuses drain into?

Answer 22

anterior and middle into hiatus semilunaris

posterior into superior meatus

Question 23

drainage from tears

Answer 23

• Tears from conjunctival sac  nose via inferior meatus (at inferior end of nasolacrimal duct)

Question 24

which nerves for smell

Answer 24

olfactory nerves

Question 25

which nerve for sensory fibers in nose

Answer 25

• Ophthalmic (V1) and maxillary (V2) divisions of trigeminal nerve for sensory fibers

Question 26

upper and lower and posterior boundary of oral cavity

Answer 26

• Upper boundary: palate
• Lower limit: mylohyoid muscle
• Posterior limit: palatoglossal arches

Question 27

cheeks via which muscle

Answer 27

buccinator muscles

Question 28

soft palate muscles

Answer 28

o Tensor Veli Palatini, Levator Veli Palatini Palatoglossus Palatopharyngeus Musculus Uvulae

Question 29

what 4 things cover the front surface of the tongue

Answer 29

• Foliate, fungiform, filiform, and vallate papillae

Question 30

tongue muscle fucntion

Answer 30

eat
speak
swallow

Question 31

intrinsic vs extrinsic muscle in tongue for

Answer 31

• Intrinsic muscles are majority of tongues mass (shape)
• Extrinsic muscles for tongue movements

Question 32

genioglossus muscle

Answer 32

extend and lower tongue

Question 33

hypoglossus muscle

Answer 33

lower and pull back rear part of tongue

Question 34

styloglossus muscle

Answer 34

lift and retract tongue

Question 35

palatoglossus muscle

Answer 35

acts on tongue but associated with palate

Question 36

mylohyoid muscle in floor of mouth to

Answer 36

• Mylohyoid muscle elevates hyoid bone during swallowing and speech

Question 37

which muscle depressed mandible and open mouth

Answer 37

• Mylohyoid and digastric muscles work to depress mandible and open mouth

Question 38

general sensation for anterior 2/3 and posterior 1/3 of tongue

Answer 38

anterior: trigeminal nerve (V)
posterior: glossopharyngeal nerve (IX)

Question 39

taste sensation for anterior 2/3 and posterior 1/3 of tongue

Answer 39

anterior: chorda tympani branch of facial nerve (VII)
posterior: glossopharyngeal nerve (IX)

Question 40

motor innervation of oral cavity - 2 nerves for palate

Answer 40

• Vagus nerve (X) branches for all muscles of palate except tensor veli palatini is innervated by mandibular division of trigeminal nerve (V3)

Question 41

what motor nerve innervates tongue muscle

Answer 41

• Hypoglossal nerve (XII)

Question 42

palatoglossus muscle innervated by what motor nerve

Answer 42

vagus

Question 43

mylohyoid and anterior belly of digastric muscle

posterior belly of digastric and stylohyoid muscle

what is the motor innervation

Answer 43

• Mylohyoid muscle and anterior belly of digastric muscle via mandibular division of trigeminal nerve (V3)
• Facial nerve (VII) for posterior belly of digastric and stylohyoid muscle