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Cochlea

Scala tympani...

Question

Scala tympani is connected to scala vestibuli by means of

A

Stapes

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B

Helicotrema

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C

Basilar membrane

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D

Tectorial membrane

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Solution

The correct option is A Helicotrema
Helicotrema is a part of cochlear duct that connects scala tympani to scala vestibuli. The hairs present near the helicotrema can detect low frequency sounds. Scala tympani and scala vestibuli are filled with perilymph. They communicate by means of helicotrema. It is a part of apex of cochlea.
So, the correct answer is 'Helicotrema'.

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(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
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