Week 2: Station 4 - The Nasal Cavity and Paranasal Air Sinuses

Question 1

What kind of epithelium forms the respiratory mucosa that lines most of the nasal cavity (not the roof)?

Answer 1

Ciliated pseudostratified columnar epithelium

Question 2

What kind of epithelium lines the roof of the nasal cavity?

Answer 2

Olfactory epithelium

Question 3

What nerve innervates olfactory mucosa and how does it enter the nasal cavity?

Answer 3

Olfactory

Through the cribriform plate

Question 4

Answer 4

A = sphenoethmoidal recess

Question 5

What bone forms the superior and middle conchae?

Answer 5

Ethmoid

Question 6

What bone forms the inferior concha?

Answer 6

Vomer

Question 7

What is the blood supply of the nasal cavity?

Answer 7

Branches of opthalmic artery

Branches from the ECA

Don’t need to know this diagram amazingly well but worth looking at

Question 8

What are the functions of the paranasal air sinuses?

Answer 8

Reduce weight of the skull

Humidifying inhaled air

Question 9

What mucosa lines the paranasal air sinuses?

Answer 9

Ciliated pseudostratified columnar epithelium

Question 10

What does the sphenoid sinus open into?

Answer 10

Sphenoethmoidal recess

Question 11

What sinuses drain into the superior meatus?

Answer 11

Posterior ethmoid air cells

Question 12

What sinuses drain into the middle meatus?

Answer 12

1. Maxillary
2. Frontal
3. Anterior ethmoidal air cells
4. Middle ethmoidal air cells

Question 13

What drains into the inferior meatus?

Answer 13

Nasolacrimal canal

Question 14

What sinus is more susceptible to sinusitis by it’s opening not being at it’s most inferior part?

Answer 14

Maxillary

Question 15

What nerve carries the pain sensation in sinusitis?

Answer 15

Trigeminal

Question 16

What is the innervation of the sphenoid sinus?

Answer 16

Opthalmic + maxillary