The sense of equilibrium by ear is the funciton of

Options

A. Basliear membrane of cochlea
B. Tectorial membrane of cochlea
C. Sensory crista of ampulla
D. Sensory cells of organ of corti.

Answer

To answer the question "The sense of equilibrium by ear is the function of," we need to analyze the options provided and understand the role of each structure in the ear.

### Step-by-Step Solution:

1. **Understand the Functions of the Ear**:
- The ear has two primary functions: hearing and maintaining balance (equilibrium).

2. **Identify the Relevant Structures**:
- The options provided are:
- Basilar membrane of cochlea
- Tectorial membrane of cochlea
- Sensory crista of ampulla
- Sensory cells of organ of corti

3. **Analyze Each Option**:
- **Basilar membrane of cochlea**: This structure is involved in the process of hearing as it plays a role in sound wave transduction.
- **Tectorial membrane of cochlea**: This is also related to hearing, as it interacts with hair cells in the cochlea to facilitate sound perception.
- **Sensory cells of organ of corti**: These cells are responsible for converting sound vibrations into neural signals, thus they are related to hearing.
- **Sensory crista of ampulla**: This structure is located in the semicircular canals of the inner ear and is responsible for detecting rotational movements, contributing to the sense of equilibrium.

4. **Determine the Correct Answer**:
- Since the question specifically asks about the sense of equilibrium, the correct answer is the **sensory crista of ampulla**, as it is directly involved in maintaining balance and detecting changes in head position.

### Final Answer:
The sense of equilibrium by ear is the function of **sensory crista of ampulla**.

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