Deck 27: Nose, Nasal Cavity, and Paranasal Sinuses

Question 1

Which is LEAST likely to interfere with the floor of the maxillary sinus during the extraction of a maxillary molar?

A) Impacted third molars
B) A dilacerated root on a second molar
C) A close relationship between the floor of the sinus to posterior root apices
D) A microdont molar

Answer 1

D
A microdont molar is least likely to interfere with the floor of the maxillary sinus because microdonts are very small teeth.It is likely that trauma to the floor of the maxillary sinus would be minimal due to sufficient surrounding tissue space.

Question 2

In a young adult,the maxillary sinus generally lies between the maxillary canine and the

A) premolars
B) first molar
C) second molar
D) third molar

Answer 2

D
In young adults,the maxillary sinus occupies an area from just posterior to the maxillary canine back to the area of the third molar.

Question 3

The opening of the maxillary sinus in the middle meatus region is located at approximately

A) the floor of the sinus
B) the floor of the orbital cavity
C) one-third upward toward the medial wall
D) two-thirds upward toward the medial wall
E) None of the above

Answer 3

D
Because the opening to the maxillary sinus is near the top of the space,drainage of fluids poses difficulties.During a nasal infection,edema causes swelling of the mucosa,which perpetuates infection in this incubator-like environment.

Question 4

Each of the following is true of the maxillary sinus EXCEPT one.Which one is the EXCEPTION?

A) The maxillary sinuses are the largest of the paranasal sinuses.
B) The maxillary sinuses open into the posterior end of the hiatus semilunaris through one or more openings.
C) The superior border of the maxillary sinus is the floor of the orbit.
D) The maxillary sinus is one anatomic structure that almost never varies among individuals.
E) During a nasal infection,swelling occurs in the nasal mucosa.

Question 5

The cilia have hairlike projections that perceive odors because they are located within the olfactory epithelium.

A) Both the statement and the reason are correct and related.
B) Both the statement and the reason are correct but are NOT related.
C) The statement is correct,but the reason is NOT correct.
D) The statement is NOT correct,but the reason is correct.
E) NEITHER the statement NOR the reason is correct.

Question 6

Each of the following has a role in trapping contaminants that enter the nasal cavity EXCEPT one.Which one is the EXCEPTION?

A) Cilia
B) Mucous
C) Goblet cells
D) Olfactory epithelium
E) All of the above help to trap contaminants.

Question 7

Infections of the frontal sinuses can cause pressure and pain just above the eye because these sinuses are located just above the orbital cavity.

A) Both the statement and the reason are correct and related.
B) Both the statement and the reason are correct but are NOT related.
C) The statement is correct,but the reason is NOT correct.
D) The statement is NOT correct,but the reason is correct.
E) NEITHER the statement NOR the reason is correct.

Question 8

The maxillary sinuses are the smallest of the paranasal sinuses.At birth,each maxillary sinus is the size of a small pea.

A) Both statements are true.
B) The first statement is true;the second statement is false.
C) The first statement is false;the second statement is true.
D) Both statements are false.

Question 9

The deeper sinuses,particularly the ethmoid,are most commonly involved in sinus infections that are difficult to localize.A new opening can be surgically created to assist with proper drainage.Note that the maxillary sinuses,while not as deep,commonly become infected.

A) Both statements are true.
B) The first statement is true;the second statement is false.
C) The first statement is false;the second statement is true.
D) Both statements are false.

Question 10

The crescent-shaped groove within the middle nasal concha is the

A) sphenoethmoid recess
B) hiatus semilunaris
C) ethmoid bulla
D) nasal aperture

Question 11

The major role of sinus cavities is warming the air that flows into the respiratory system because the air passes over the cilia,which have an increased internal temperature.

A) Both the statement and the reason are correct and related.
B) Both the statement and the reason are correct but are NOT related.
C) The statement is correct,but the reason is NOT correct.
D) The statement is NOT correct,but the reason is correct.
E) NEITHER the statement NOR the reason is correct.

Question 12

Most of the openings into the nasal cavity from other areas are known as the sphenoid sinuses.There are four pairs of paranasal sinuses.

A) Both statements are true.
B) The first statement is true;the second statement is false.
C) The first statement is false;the second statement is true.
D) Both statements are false.

Question 13

The lateral walls of the nasal cavity are formed by the inferior concha(e).The point where the ethmoid bone and the maxillae meet in the lateral wall is called the superior nasal concha.

A) Both statements are true.
B) The first statement is true;the second statement is false.
C) The first statement is false;the second statement is true.
D) Both statements are false.

Question 14

Under normal circumstances,sinuses are filled with

A) fluid
B) blood
C) air
D) bones of the cranium

Question 15

The ethmoid sinuses are frequently called the paranasal sinuses because they are not single-paired sinuses but are divided into numerous small compartments.

A) Both the statement and the reason are correct and related.
B) Both the statement and the reason are correct but are NOT related.
C) The statement is correct,but the reason is NOT correct.
D) The statement is NOT correct,but the reason is correct.
E) NEITHER the statement NOR the reason is correct.

Question 16

The most complicated portion of the nasal cavity is its lateral walls because the upper half to two-thirds is formed by parts of the ethmoid bone and the lower part is formed by portions of the mandible.

A) Both the statement and the reason are correct and related.
B) Both the statement and the reason are correct but are NOT related.
C) The statement is correct,but the reason is NOT correct.
D) The statement is NOT correct,but the reason is correct.
E) NEITHER the statement NOR the reason is correct.

Question 17

The most posterior-superior part of the nasal cavity is

A) where the ethmoid meets the sphenoid bone.
B) the choana.
C) the superior nasal concha.
D) the ethmoid bulla.

Question 18

The lateral margin of the external nose is known as an ala.

Question 19

The vomer and ethmoid bones form the main part of the nasal septum.

Question 20

The respiratory epithelium in the roof of the nasal cavity,upper surfaces of both the superior concha,and nasal septum is modified.This tissue has nerve fibers that can perceive odors.

A) Both statements are true.
B) The first statement is true;the second statement is false.
C) The first statement is false;the second statement is true.
D) Both statements are false.

Question 21

The maxillae and the ethmoid form the interior portion of the floor of the nasal cavity.

Question 22

The pituitary fossa is located above the sphenoid sinuses.

Question 23

The area underneath each concha is known as a __________.

Question 24

The sinuses that are subdivided into numerous small compartments are the __________ sinuses.

Question 25

Pain over the eye is most likely caused by infection in the ___________ sinus.

Question 26

It is possible that a periapical infection of a tooth may involve the _______sinus.

Question 27

The __________ ethmoid sinuses are located within the ethmoid bulla.

Question 28

Both the anterior and middle ethmoid sinuses are located in the meatus of the superior nasal concha.