The amphids are cuticular elevations on the ventrolateral lips of Ascaris. These are

Options

A. Chemoreceptors
B. Gustatoreceptors
C. Olfactoreceptors
D. Tactoreceptors

Answer

To answer the question regarding the amphids in Ascaris, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Structure**: The amphids are described as cuticular elevations located on the ventrolateral lips of Ascaris. This indicates their anatomical position.

2. **Understand the Function**: The amphids serve a sensory function. They are involved in detecting environmental changes.

3. **Explore the Options**: The question provides several options regarding the function of the amphids:
- Chemoreceptors
- Gustatoreceptors
- Olfactory receptors
- Tactoreceptors

4. **Analyze Each Option**:
- **Chemoreceptors**: These receptors detect chemical changes in the environment, such as temperature and salinity.
- **Gustatoreceptors**: These are involved in the sense of taste and help in the ingestion of food.
- **Olfactory Receptors**: These receptors are related to the sense of smell.
- **Tactoreceptors**: These receptors are involved in the sense of touch and movement.

5. **Determine the Correct Function**: Given the location of the amphids on the ventrolateral lips, they are primarily involved in detecting chemical signals in the environment, which aligns with the function of chemoreceptors.

6. **Conclusion**: Therefore, the correct answer regarding the function of the amphids in Ascaris is that they act as **chemoreceptors**.