Loreal pit of Vipers is

Options

A. thermoreceptor
B. gustatoreceptor
C. photoreceptor
D. phonoreceptor

Answer

### Step-by-Step Solution:

1. **Definition of Loreal Pit**: The Loreal pit is a specialized structure found in vipers. It is described as a deep depression located on either side of the head of the snake.

2. **Location of Loreal Pit**: Specifically, the Loreal pit is situated behind the nostril and in front of the eye. This strategic positioning allows it to function effectively.

3. **Function of Loreal Pit**: The primary function of the Loreal pit is to serve as a thermoreceptor. It has an external opening that is sensitive to infrared radiation.

4. **Detection of Temperature Changes**: Vipers utilize the Loreal pit to detect temperature changes in their environment. This ability is crucial for locating warm-blooded prey.

5. **Prey Capture**: By sensing the infrared radiation emitted by warm-blooded animals, vipers can effectively locate and capture their prey, making the Loreal pit an essential adaptation for their survival.

6. **Conclusion**: Therefore, the Loreal pit in vipers is a thermoreceptor that helps them detect temperature changes, aiding in the capture of prey.