Anatomy of Paranasal Sinuses is part of the Nose section of ENT. Practise 28 exam-style MCQs for NEET PG, FMGE, INI-CET and NEET SS, each with the correct answer and a detailed explanation.
Anatomy of Paranasal Sinuses MCQs test maxillary articulations, Caldwell views, and Onodi and Haller cell relations to the optic nerve and orbit, in high-yield NEET PG revision for FMGE, INI-CET and NEET SS.
Sample Anatomy of Paranasal Sinuses MCQs with answers
Sample MCQ #1
A 125-lb, 40-year-old woman with a history of nasal polyps and aspirin sensitivity since childhood presents to the Emergency Department with status asthmaticus and hypercapnic respiratory failure. She requires immediate intubation and is placed on a mechanical ventilator on an FIO2 of 40%, a control rate of 15 breaths/min, and a tidal volume of 500 mL. Which of the following is her approximate alveolar ventilation?
A375 mL/min
B3500 mL/min
C5250 mL/min
D5625 mL/min
Show Answer & Explanation ▾
✓ Correct Answer: D. 5625 mL/min
Alveolar ventilation ( VA ) equals the tidal volume ( VT ) minus the deadspace volume ( VD ) times the breathing frequency ( f ). The deadspace volume can be estimated as 1 mL/lb of body weight. VA = ( VT - VD ) x f VA = (500 mL - 125 mL) x 15 breaths/min VA = 5625 mL/min Reference: Ganong, pp 658-660. Kasper et al., pp 1508-1516. Levitzky, pp 67-71.
Sample MCQ #2
Maxillary bone does not articulate with:
AEthmoid
BSphenoid
CFrontal
DLacrimal
Show Answer & Explanation ▾
✓ Correct Answer: B. Sphenoid
Ans: B. Sphenoid (Ref Gray's 41/e p484, 40/e p473-476) Maxillary bone does not articulate with sphenoid. Articulation of maxilla: Each maxilla articulates with nine bones: Two of cranium: Frontal & ethmoid. Seven of the face: Nasal, zygomatic, lacrimal, inferior nasal concha, palatine, vomer & adjacent fused maxilla. Sometimes articulates with orbital surface & with lateral pterygoid plate of sphenoid.
Sample MCQ #3
Frontal sinus can be best visualized by:
ACaldwell's view
BWater's view
CTowne's view
DSchuller's view
Show Answer & Explanation ▾
✓ Correct Answer: A. Caldwell's view
Caldwell view (Occipitofrontal view or nose-forehead position) - Frontal sinus – seen best Shows all sinuses except sphenoid sinus Water’s view (occipitomental view or nose-chin position)- Maxillary sinuses (seen best). Shows all sinuses except ethmoid Sphenoid sinus seen only if the film is taken with open mouth Towne’s view is taken for acoustic neuroma and apical petrositis. Schuller’s view is taken for mastoiditis, cholesteotoma, longitudinal fracture of petrous pyramid. Reference – Diseases of Ear, Nose and Throat & Head and Neck Surgery by P L Dhingra ,8 th Edition, pg. no – 509- 511
Sample MCQ #4
Onodi cells and Haller cells of ethmoid are related respectively to:
AOrbital floor, Optic nerve
BOrbital floor, Internal carotid Artery
CNasolacrimal duct
DOptic nerve, orbital floor
Show Answer & Explanation ▾
✓ Correct Answer: D. Optic nerve, orbital floor
These are variations of ethmoidal air cells. Onodi cell is a variation of posterior ethmoid air cells and lies in close relation to optic nerve . Haller cell is a variation of anterior ethmoid air cells and lies in relation to orbital floor . When present they can increase the chance of complications during FESS. Reference - Diseases of Ear, Nose and Throat & Head and Neck Surgery by P L Dhingra , 8 th Edition, pg. no – 159, 219
Sample MCQ #5
Which of the following is not true about ethmoid air cells
APosterior ethmoid air cells are 1 to 8.
BAnterior and posterior ethmoid air cells are separated by basal lamella
CBulla ethmoidalis is the anterior most anterior ethmoidal air cell
DAnterior ethmoid air cells are 2 to 8
Show Answer & Explanation ▾
✓ Correct Answer: C. Bulla ethmoidalis is the anterior most anterior ethmoidal air cell
The two named constant cells of the anterior ethmoid group include - Agger nasi is the anterior most anterior ethmoidal air cell . It is also called fourth turbinate. Bulla ethmoidalis is the largest and most consistent anterior ethmoid air cell. Anterior and posterior ethmoid air cells are separated by basal lamella or ground lamella. Posterior ethmoid air cells are 1 to 8. Anterior ethmoid air cells are 2 to 8. Reference - Scott Brown’s Otolaryngology, Head and Neck Surgery, 8 th edition – Volume 1 – Page - 973
What you can practise in Anatomy of Paranasal Sinuses
28 Anatomy of Paranasal Sinuses MCQs on Anatomy, Paranasal Sinuses, Nose — each with detailed explanations
Previous-year question practice across NEET PG, FMGE, INI-CET and NEET SS
Progress and performance tracking to measure retention
Anatomy of Paranasal Sinuses MCQs test maxillary articulations, Caldwell views, and Onodi and Haller cell relations to the optic nerve and orbit, in high-yield NEET PG revision for FMGE, INI-CET and NEET SS.
How many Anatomy of Paranasal Sinuses questions are there, and which exams do they cover?
MedLadder includes 28 curated MCQs for Anatomy of Paranasal Sinuses under ENT (Nose), covering NEET PG, FMGE, INI-CET and NEET SS preparation.
