Part of ear concerned with hearing is

Options

A. Reissner's membrane and tectorial membrane
B. Basilar membrane and tectorial membrane
C. Reissner's membrane and basilar membran e
D. Ampulla.

Answer

To solve the question "Part of ear concerned with hearing is," we need to analyze the options provided and understand the anatomy of the ear.

### Step-by-Step Solution:

1. **Understanding the Structure of the Ear**: The ear is divided into three main parts: the outer ear, middle ear, and inner ear. Each part has specific functions related to hearing.

2. **Function of the Outer Ear**: The outer ear collects sound waves and directs them toward the middle ear.

3. **Function of the Middle Ear**: The middle ear amplifies the sound waves through vibrations and transmits these vibrations to the inner ear.

4. **Function of the Inner Ear**: The inner ear is where the actual process of hearing occurs. It contains the cochlea, which is a spiral structure crucial for hearing.

5. **Components of the Cochlea**: The cochlea has three canals:
- Scala tympani
- Scala media
- Scala vestibuli

6. **Role of the Scala Media**: The scala media contains the basilar membrane and is filled with a fluid called endolymph. The basilar membrane is crucial for the hearing process.

7. **Organ of Corti**: Located on the basilar membrane, the Organ of Corti contains hair cells, which are the sensory receptors for hearing. These hair cells are covered by the tectorial membrane.

8. **Vibrations and Hearing**: When sound vibrations reach the cochlea, they cause the basilar membrane to vibrate. This vibration stimulates the hair cells, which then send auditory signals to the brain via the auditory nerve.

9. **Evaluating the Options**:
- **Reissner's membrane and tectorial membrane**: Reissner's membrane is not directly involved in hearing.
- **Basilic membrane and tectorial membrane**: This is correct as both are involved in the hearing process.
- **Reissner's membrane and Basilic membrane**: Again, Reissner's membrane is not involved in hearing.
- **Ampulla**: This structure is related to balance, not hearing.

10. **Conclusion**: The correct answer is **Basilic membrane and tectorial membrane**, as they are directly involved in the process of hearing.

### Final Answer:
The part of the ear concerned with hearing is the **basilar membrane and tectorial membrane**.