ENT – Anatomy of Ear – Set 3
1. Secondary tympanic membrane is present over
a) Round window
b) Oval window
c) Lateral wall of middle ear
d) Scala media
2. The distance between tympanic membrane and medial wall of middle ear at the level of center is
a) 3mm
b)4mm
c)6mm
d)2mm
3. Distance of promontory from tympanic membrane –
a) 2mm
b) 5mm
c) 6mm
d) 7mm
4. The size of the Fenestra Vestibule on an average is
a) 3.50 mm long and 2.50 mm wide
b) 3.25 mm long and 1.75 mm wide
c) 3.75 mm long and 1.50 mm wide
d) 4.00 mm long and 2.00 mm wide
5. What is the type of joint between the ossicles of ear-
a) Fibrous joint
b) Primary cartilaginous
c) Secondary cartilaginous
d) Synovial joint
6. Sensory nerve supply of middle ear cavity is provided by –
a) Facial
b) Glossopharyngeal
c) Vagus
d) Trigeminal
7. All of the following form the boundary of MacEwen’s
triangle except –
a) Temporal line
b) Posterosuperior segment of bony external auditory canal
c) Promontory
d) Tangent drawn to the external auditory meatus
8. All of the following form the boundary of MacEwen’s triangle except –
a) Squamous temporal
b) Tegmen Antri
c) SCC
d) None
9.About Eustachian tube
a) 24 mm in length
b) Outer l/3rds is cartilagenous
c) Inner 2/3rds is bony
d) Inner 2/3rds is cartilaginous
e) Opens during swallowing
10. The length of Eustachian tube is
a) 16 mm
b) 24mm
c) 36 mm
d) 40mm
