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At the base of cochlea, scala vestibuli ...

At the base of cochlea, scala vestibuli ends at the__ window, while the scala lympani terminates at the ___window which open into __ ear.

A

oval, round, inner

B

oval, round, outer

C

round, Oval, outer

D

oval, round, middle

Text Solution

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The correct Answer is:
**Step-by-Step Text Solution:** 1. **Understanding the Structure of the Cochlea**: The cochlea is a spiral-shaped structure in the inner ear that plays a crucial role in hearing. It consists of three fluid-filled chambers: the scala vestibuli, scala media, and scala tympani. 2. **Identifying the End of Scala Vestibuli**: At the base of the cochlea, the scala vestibuli ends at a structure known as the **oval window**. This window is a membrane-covered opening that receives sound vibrations from the middle ear. 3. **Identifying the Termination of Scala Tympani**: The scala tympani, another chamber of the cochlea, terminates at the **round window**. This window also has a membrane and allows for the movement of fluid within the cochlea, accommodating the pressure changes caused by sound waves. 4. **Understanding the Connection to the Middle Ear**: The round window opens into the **middle ear**. The middle ear is the cavity that contains the ossicles (small bones) and connects to the outer ear via the eardrum. 5. **Final Answer**: Therefore, the complete answer to the question is: - At the base of the cochlea, scala vestibuli ends at the **oval window**, while the scala tympani terminates at the **round window**, which opens into the **middle ear**. ---
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Assertion:The inner ear contains three ossicles (malleus, incus and stapes) which are attached to one another in a chain-like fashion. Reason:The stapes is attached to the tympanic membrane and the malleus is attached to the oval window of the cochlea.