Question

Choose the wrong statements with reference to human inner ear.
(a) Bony labyrinth divides into two areas namely cochlea and vestibule
(b) Scala vestibuli and scale media are separated by a membrane called Reissner's membrane
(c) Scala media and scala tympani are separated by basilar membrane
(d) Scala vestibuli and scala tympani are filled with endolymph.

• A. a and c
• B. a and d
• C. a and b
• D. b and c

Answer 1

The correct option is B a and d

(a) Bony labyrinth is a series of channels which enclose membranous labyrinth filled with endolymph.

(b) Scala vestibuli and scala media (cochlear duct) are separated from each other by a membrane called Reissner's membrane.

(c) Basilar membrane is present in the inner ear and separates scala media and scala tympani.

(d) Scala vestibuli and scala tympani are the canals of cochlea and filled with perilymph.

Hence, statements a and d are incorrect.

So, the correct answer is 'a and d'.