Lateral nasal wall

LATERAL NASAL WALL

Q. 1

All open into hiatus semilunaris except

 A

Posterior ethmoid sinus

 B

Anterior ethmoid sinus

 C

Frontal sinus

 D

Maxillary sinus

Q. 1

All open into hiatus semilunaris except

 A

Posterior ethmoid sinus

 B

Anterior ethmoid sinus

 C

Frontal sinus

 D

Maxillary sinus

Ans. A

Explanation:

Q. 2

Paranasal sinuses communicate with the nose through its openings. Following group of ethmoidal sinuses drain into superior meatus:

 A

Anterior

 B

Middle

 C

Posterior

 D

Middle + Posterior

Q. 2

Paranasal sinuses communicate with the nose through its openings. Following group of ethmoidal sinuses drain into superior meatus:

 A

Anterior

 B

Middle

 C

Posterior

 D

Middle + Posterior

Ans. C

Explanation:

The frontal sinus drains into the anterior part of the hiatus semilunaris via the infundibulum. 

The maxillary sinus also drains into the hiatus semilunaris, as do the anterior and middle ethmoidal sinuses. 

The posterior ethmoidal sinuses drain into the superior meatus. 

The sphenoid sinus drains into the space above the superior concha called the sphenoethmoidal recess.


Q. 3

All of the following structures open into the middle meatus, EXCEPT:

 A

Ant. ethmoidal sinus

 B

Post. ethmoidal sinus

 C

Frontonasal duct

 D

Maxillary sinus

Q. 3

All of the following structures open into the middle meatus, EXCEPT:

 A

Ant. ethmoidal sinus

 B

Post. ethmoidal sinus

 C

Frontonasal duct

 D

Maxillary sinus

Ans. B

Explanation:

Posterior ethmoid sinus opens into superior meatus. 
  • Anterior ethmoid cells are divided into frontal recess cells, which open into the frontal recess of the middle meatus, infundibular cells which open into the ethmoid infundibulum and and bullae or middle ethmoid cells which open into the middle meatus.
  • Maxillary sinus drain into the middle meatus of nasal cavity.  The frontal sinus opens into the infundibulum of middle meatus through frontonasal duct.
  • Sphenoid sinus opens into the sphenoethmoidal recess above and behind the superior nasal concha. 

Q. 4

The maxillary sinus opens into middle meatus at the level of:

 A

Hiatus semilunaris

 B

Bulla ethmoidalis

 C

Infundibulum

 D

None of the above

Q. 4

The maxillary sinus opens into middle meatus at the level of:

 A

Hiatus semilunaris

 B

Bulla ethmoidalis

 C

Infundibulum

 D

None of the above

Ans. A

Explanation:

The maxillary sinus is the largest of the paranasal sinuses and is located in the maxilla, lateral to the nasal cavity and inferior to the orbit.

The maxillary sinus opens into the posterior aspect of the hiatus semilunaris in the middle meatus.

The infraorbital nerve (CN V-2) primarily innervates the maxillary sinus.

 

 


Q. 5

Paired bones are:

 A

Inferior Concha

 B

Frontal bone

 C

Nasal bone

 D

A & C

Q. 5

Paired bones are:

 A

Inferior Concha

 B

Frontal bone

 C

Nasal bone

 D

A & C

Ans. D

Explanation:

A i.e. Inferior concha; C i.e. Nasal bone 

Inferior nasal concha & nasal bones are paired bones; whereas vomer, frontal and ethmoid are unpaired bones.


Q. 6

Frontonasal duct opens into:

 A

Inferior meatus

 B

Middle meatus

 C

Superior meatus

 D

Inferior turbinate

Q. 6

Frontonasal duct opens into:

 A

Inferior meatus

 B

Middle meatus

 C

Superior meatus

 D

Inferior turbinate

Ans. B

Explanation:

Q. 7

Frontal sinus drain into:

 A

Superior meatus

 B

Inferior meatus

 C

Middle meatus

 D

Ethmoid recess

Q. 7

Frontal sinus drain into:

 A

Superior meatus

 B

Inferior meatus

 C

Middle meatus

 D

Ethmoid recess

Ans. C

Explanation:

Q. 8

Hiatus semilunaris is present in:

 A

Superior meatus

 B

Middle meatus

 C

Inferior meatus

 D

Spenoethmoidal recess

Q. 8

Hiatus semilunaris is present in:

 A

Superior meatus

 B

Middle meatus

 C

Inferior meatus

 D

Spenoethmoidal recess

Ans. B

Explanation:

Q. 9

Bulla ethmoidalis is seen in:

 A

Superior meatus

 B

Inferior meatus

 C

Middle meatus

 D

Sphenoethmoidal recess

Q. 9

Bulla ethmoidalis is seen in:

 A

Superior meatus

 B

Inferior meatus

 C

Middle meatus

 D

Sphenoethmoidal recess

Ans. C

Explanation:

 

Middle meatus lies between the middle and inferior turbinates and is important because of the presence of osteomeatal complex in this area.


Q. 10

Sphenoidal sinus opens into:

 A

Inferior meatus

 B

Middle meatus

 C

Superior meatus

 D

Sphenoethmoidal recess

Q. 10

Sphenoidal sinus opens into:

 A

Inferior meatus

 B

Middle meatus

 C

Superior meatus

 D

Sphenoethmoidal recess

Ans. D

Explanation:

 

Sphenoethmoid recess is situated above the superior turbinate and receives opening of sphenoidal sinus.


Q. 11

Nasolacrimal duct opens into:

 A

Superior meatus

 B

Middle meatus

 C

Inferior meatus

 D

Sphenopalatine recess

Q. 11

Nasolacrimal duct opens into:

 A

Superior meatus

 B

Middle meatus

 C

Inferior meatus

 D

Sphenopalatine recess

Ans. C

Explanation:

Ans. is c i.e Inferior meatus

  • Nasolacrimal duct opens into inferior meatus below the level of inferior turbinate
  • Nasolacrimal duct is guarded at its temporal end by a mucosal valve k/a Hasner’s valve
  • Frontonasal duct opens into middle meatus.



Q. 12

Inferior turbinate is a:

 A

Part of maxilla

 B

Part of sphenoid

 C

Separate bone

 D

Part of ethmoid

Q. 12

Inferior turbinate is a:

 A

Part of maxilla

 B

Part of sphenoid

 C

Separate bone

 D

Part of ethmoid

Ans. C

Explanation:

Q. 13

Which of the following is known as fourth turbinate?

 A

Superior turbinate

 B

Aggernasi

 C

Supreme turbinate

 D

Bulous turbinate

Q. 13

Which of the following is known as fourth turbinate?

 A

Superior turbinate

 B

Aggernasi

 C

Supreme turbinate

 D

Bulous turbinate

Ans. C

Explanation:

Q. 14

Turbinate that articulates with ethmoid is:

 A

Superior

 B

Middle

 C

Inferior

 D

All of the above

Q. 14

Turbinate that articulates with ethmoid is:

 A

Superior

 B

Middle

 C

Inferior

 D

All of the above

Ans. C

Explanation:

 

Middle turbinate and superior turbinate are a part of the ethmoidal bone whereas inferior turbinate is an independant bone which articulates with the ethmoid bone, completing the medial wall of nasolacrimal duct.


Q. 15

All open into hiatus semilunaris except:

 A

Posterior ethmoid sinus 

 B

Anterior ethmoid sinus

 C

Frontal sinus

 D

Maxillary sinus

Q. 15

All open into hiatus semilunaris except:

 A

Posterior ethmoid sinus 

 B

Anterior ethmoid sinus

 C

Frontal sinus

 D

Maxillary sinus

Ans. B

Explanation:

Q. 16

True about sphenoid sinus:

 A

Lined by stratified squamous epithelium

 B

Duct open in middle meatus

 C

Open in sphenoethmoid recess

 D

Present at birth

Q. 16

True about sphenoid sinus:

 A

Lined by stratified squamous epithelium

 B

Duct open in middle meatus

 C

Open in sphenoethmoid recess

 D

Present at birth

Ans. C

Explanation:

 

  • All paranasal sinuses are lined by respiratory epithelium (i.e. ciliated pseudo stratified columnar epithelium) 

Sphenoid sinus: 

  • It is not present at birth
  • It occupies the body of sphenoid
  • Ostrum of sphenoid sinus is situated in the upper part of anterior wall and drains into spheno ethmoidal recess.
  • On x ray: Sphenoid sinus is visible by 4 years of age.



Q. 17

Sinus opening in middle meatus is:     

September 2011

 A

Posterior ethmoid sinus

 B

Sphenoid sinus

 C

Frontal sinus

 D

Nasolacrimal duct

Q. 17

Sinus opening in middle meatus is:     

September 2011

 A

Posterior ethmoid sinus

 B

Sphenoid sinus

 C

Frontal sinus

 D

Nasolacrimal duct

Ans. C

Explanation:

Ans. C: Frontal Sinus

Frontal sinus opens into the middle meatus of the nose at the anterior end of hiatus semilunaris

Middle Meatus

  • It is a nasal opening or canal situated between the middle and inferior conchae, and extends from the anterior to the posterior end of the latter.
  • On it is a curved fissure, the hiatus semilunaris and limited below by the edge of the uncinate process of the ethmoid and above by an elevation named the bulla ethmoidalis; the middle ethmoidal cells are contained within this bulla and open on or near to it.
  • Through the hiatus semilunaris the meatus communicates with a curved passage termed the infundibulum, which communicates in front with the anterior ethmoidal cells and in rather more than fifty percent of skulls is continued upward as the frontonasal duct into the frontal air-sinus; when this continuity fails, the frontonasal duct opens directly into the anterior part of the meatus.
  • Below the bulla ethmoidalis and hidden by the uncinate process of the ethmoid is the opening of the maxillary sinus (ostium maxillare); an accessory opening is frequently present above the posterior part of the inferior nasal concha.



Q. 18

Posterior ethmoid sinus opens in which meatus‑

 A

Superior

 B

Middle

 C

Inferior

 D

Spenoethmoidal recess

Q. 18

Posterior ethmoid sinus opens in which meatus‑

 A

Superior

 B

Middle

 C

Inferior

 D

Spenoethmoidal recess

Ans. A

Explanation:

Ans. is ‘a’ i.e., Superior


Q. 19

Maxillary sinus drains into ‑

 A

Inferior meatus

 B

Middle meatus

 C

Superior meatus

 D

Sphenoethmoidal recess

Q. 19

Maxillary sinus drains into ‑

 A

Inferior meatus

 B

Middle meatus

 C

Superior meatus

 D

Sphenoethmoidal recess

Ans. B

Explanation:

 Middle meatus


Q. 20

Nasolacrimal duct opens in which part of internal nose ?

 A

Superior meatus

 B

Inferior meatus

 C

Middle meatus

 D

Spenoethmoidal recess

Q. 20

Nasolacrimal duct opens in which part of internal nose ?

 A

Superior meatus

 B

Inferior meatus

 C

Middle meatus

 D

Spenoethmoidal recess

Ans. B

Explanation:

Ans. is ‘b’ i.e., Inferior meatus


Q. 21

Middle turbinate is a ‑

 A

Separate bone

 B

Part of ethmoid

 C

Part of sphenoid

 D

Part of zygomatic

Q. 21

Middle turbinate is a ‑

 A

Separate bone

 B

Part of ethmoid

 C

Part of sphenoid

 D

Part of zygomatic

Ans. B

Explanation:

There are three turbinates in the lateral wall of nose : superior, middle and inferior.

The inferior turbinate is a separate bone, while rest of the turbinates are a part of ethmoidal bone.

Below and lateral to each turbinate is the corresponding meatus.

Inferior turbinate is longest one.


Q. 22

Largest turbinate in nose is ‑

 A

Superior

 B

Middle

 C

Inferior

 D

All are same

Q. 22

Largest turbinate in nose is ‑

 A

Superior

 B

Middle

 C

Inferior

 D

All are same

Ans. C

Explanation:

Ans. is ‘c’ i.e., Inferior 

  • The nasal conchae or turbinates are curved bony projections directed downwards and medially.
  1. The inferior concha is the largest and is an independent bone.
  2. The middle concha is also a projection from the medial surface of ethmoiod.
  3. The superior concha is the smallest and also arises from the medial surface of the ethmoid. 
  • The meatuses of the nose are passages beneath the overhanging conchae.


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