The roof of scala media is called

Options

A. Reissner's membrane
B. Basiliar membrane
C. Tectorial membrane
D. Organ of corti

Answer

**Step-by-Step Solution:**

1. **Understanding Scala Media**: Scala media, also known as the cochlear duct, is one of the three fluid-filled chambers in the cochlea of the inner ear. It plays a crucial role in the auditory system.

2. **Identifying the Roof of Scala Media**: The roof of the scala media is a membrane that separates it from the upper chamber, known as scala vestibuli.

3. **Recognizing the Membrane**: The membrane that serves as the roof of scala media is called Reissner's membrane. This membrane is essential for the separation of the cochlear duct (scala media) from the vestibular duct (scala vestibuli).

4. **Explaining the Function**: Reissner's membrane is responsible for maintaining the structure of the cochlea and plays a role in the mechanics of hearing by separating the different fluid compartments.

5. **Eliminating Other Options**:
- **Basilar Membrane**: This is located below the scala media and is not the roof.
- **Tectorial Membrane**: This membrane is above the organ of Corti but is not the roof of scala media itself.
- **Organ of Corti**: This is the sensory organ for hearing located within the scala media but is not a membrane.

6. **Conclusion**: Therefore, the correct answer to the question "The roof of scala media is called" is Reissner's membrane.

**Final Answer**: Reissner's membrane

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