Question

178. The lower membrane of the scala vestibuli is
the
(a) Tympanic membrane
(b) Reissner's membrane
(c) Basilar's membrane
(d) Tectorial membrane
​

Answer 1

Tympanic membrane....

Answer 2

Answer:

The lower membrane of the Scala Vestibuli is Reissner’s membrane or vestibular membrane.

Explanation:

The cochlea consists of Scala vestibuli followed by Scala media and scala tympani. The Reissner’s membrane or vestibular membrane separated the Scala vestibule and Scala media, and the basilar membrane separates the scala media from Scala tympani.

• Ressner’s membrane is very thin and is easily moves, without obstructing the passage of sound from the Scala vestibuli into the Scala media.

• Riessner’s membrane contributes by maintaining a special kind of fluid present in the Scala media which is required for the normal functioning of sound-receptive hair cells.