nasal cavity

Question 1

nose comprises what percent of total volume of nasal airway

Answer 1

30%

Question 2

function of the nose and nasal airway

Answer 2

warms and humidifies air
humidifies air to 80%
warms are to 90 degrees
paranasal sinuses release NO
filter air

Question 3

why is mouth breathing bad

Answer 3

the nose isn’t able to execute most of its functions like humidifying and warming air

Question 4

anterior apertures of nasal cavity

Answer 4

nares, open onto inferior surface of nose

Question 5

posterior aperture of nasal cavity

Answer 5

choanae, open into nasopharynx

Question 6

the nasal cavities are separated from

Answer 6

each other by midline septum, oral cavity below by hard palate, and cranial cavity above by parts of the frontal, ethmoid, and sphenoid bones

Question 7

function of the nasal turbinates

Answer 7

inferior-largest, airflow direction, filters air, humidify, and heat air
middle- protect opening of maxillary and ethmoidal sinuses, buffer to protect the sinuses from pressurized air flow
superior- protect olfactory bulbs

Question 8

method to visualize nasal airway

Answer 8

lift tip of nose gently opening nasal vestibule, shine bright light into nasal airway

Question 9

nasal airway contains _____ from paranasal sinuses

Answer 9

nitric oxide, delivered continuously into nasal airway

Question 10

nitric oxide is a

Answer 10

vasodilator and enhances uptake of O2 by blood

Question 11

blood oxygen levels are ____ with nose breathing

Answer 11

10% higher

Question 12

skeleton of nasal cavity

Answer 12

ethmoids, sphenoids, frontal bone, vomer (separates nasal cavity-septum)

Question 13

three pairs of bones that form roof of nose

Answer 13

frontal (nasal process)
maxilla (frontal proces) and palatine process
nasal

Question 14

cartilage that forms dorsum and apex of nose

Answer 14

septal, lateral nasal, alar

Question 15

innervation of nose

Answer 15

two types
olfaction via olfactory nerve (CN I)
sensation via branches of ophthalmic and maxillary divisions of trigeminal

Question 16

ophthalmic nerve gives rise to

Answer 16

lacrimal, frontal, nasocillary

Question 17

nasocillary nerve gives rise to and innervates

Answer 17

infratrochlear, innervates superior aspect of external nose
external nasal, provides sensation at nasal tip, medial aspect alar rim, dorsum nose

Question 18

maxillary innervation of nose

Answer 18

bilateral innervation of lateral dorsum and alar rim- 4 branches

Question 19

4 branches of maxillary nerve to nose

Answer 19

infraorbital, posterior superior alveolar, zygomatic, ganglionic

Question 20

nasal vestibule

Answer 20

small dilated space just internal to the naris

Question 21

arteries that supply nasal cavity include vessels that originate from

Answer 21

internal and external carotid arteries

Question 22

vessels supplying nose from external carotid

Answer 22

sphenopalatine, greater palatine, superior labial, lateral nasal

Question 23

vessels supplying nose from internal carotid

Answer 23

anterior and posterior ethmoidal arteries

Question 24

largest vessel supplying nasal cavity is

Answer 24

sphenopalatine artery- terminal branch of maxillary in PP fossa

Question 25

3 major arteries of nose

Answer 25

opthalmic- ICA maxillary- ECA facial- ECA

Question 26

where do nose bleeds come from

Answer 26

Kiesselbachs plexus

Question 27

veins that pass with branches that ultimately originate from maxillary artery drain into

Answer 27

pterygoid plexus of veins in ITF

Question 28

veins from anterior regions of nasal cavities join

Answer 28

facial vein

Question 29

one of the largest emissary veins and where its drains into

Answer 29

superior ophthalmic vein, cavernous sinus

Question 30

veins that accompany the anterior and posterior ethmoidal arteries are tributaries of

Answer 30

superior ophthalmic vein

Question 31

how many paranasal sinuses are there

Answer 31

4- ethmoidal, sphenoidal, maxillary, frontal

Question 32

frontal sinus drains onto

Answer 32

lateral wall of middle meatus via frontonasal duct

Question 33

anterior ethmoidal air cell open into

Answer 33

ethmoidal infundibulum or frontonasal duct

Question 34

middle ethmoidal air cell open into

Answer 34

ethmoidal bulla or lateral wall above

Question 35

posterior ethmoidal air cell open into

Answer 35

lateral wall of superior nasal meatus