Deformation of sensory dendrites is required to establish a nerve impulse in all of the following except:

Options

A. gustatory hair cells
B. organ of Corti
C. Pacinian corpuscles
D. lateral line organs

Explanation

To solve the question regarding which sensory structure does not require the deformation of sensory dendrites to establish a nerve impulse, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: The question asks which of the given sensory structures does not require deformation of sensory dendrites to generate a nerve impulse.

2. **Identify the Options**: The options provided are:
- Gustatory hair cells
- Organ of Corti
- Pacinian corpuscles
- Lateral line organs

3. **Analyze Each Option**:
- **Gustatory Hair Cells**: These are involved in the sense of taste. They do not rely on the deformation of dendrites in the same way that mechanoreceptors do. Instead, they respond to chemical stimuli.
- **Organ of Corti**: This structure is located in the cochlea of the inner ear and is responsible for hearing. It contains hair cells that respond to sound vibrations, requiring deformation of their dendrites to generate nerve impulses.
- **Pacinian Corpuscles**: These are mechanoreceptors located in the skin and other tissues that respond to pressure and vibration. They require deformation of their dendrites to initiate a nerve impulse.
- **Lateral Line Organs**: Found in fish, these organs detect water movements and vibrations. They also rely on the deformation of sensory dendrites to function.

4. **Conclusion**: Based on the analysis, the structure that does not require deformation of sensory dendrites to establish a nerve impulse is the **Gustatory Hair Cells**.

### Final Answer:
The correct answer is **Gustatory Hair Cells**.