Osphradium of Pila globosa is

Options

A. chemoreceptor
B. photoreceptor
C. thermoreceptor
D. tangoreceptor

Answer

To answer the question regarding the osphradium of Pila globosa, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Osphradium**:
- The osphradium is a sensory organ found in certain mollusks, including Pila globosa (commonly known as the apple snail). It plays a crucial role in sensing the environment.

**Hint**: Recall that sensory organs are specialized structures that help organisms perceive their surroundings.

2. **Function of Osphradium**:
- The primary function of the osphradium is to monitor the water and its flow. It helps the organism assess the quality of water entering its body.

**Hint**: Think about how organisms interact with their environment, particularly how they sense changes in their habitat.

3. **Identifying the Type of Receptor**:
- The question offers several options: chemoreceptor, photoreceptor, thermoreceptor, or tango receptor.
- A chemoreceptor responds to chemical stimuli, while a photoreceptor responds to light, a thermoreceptor responds to temperature changes, and a tango receptor is related to taste.

**Hint**: Consider what type of stimuli the osphradium would need to detect in order to monitor water quality.

4. **Conclusion**:
- Since the osphradium of Pila globosa detects chemical changes in the water, it is classified as a chemoreceptor. This organ is specifically adapted to sense the chemical composition of the water, which is vital for the snail's survival.

**Hint**: Remember that the term "chemo-" refers to chemicals, which is key to identifying the correct receptor type.

### Final Answer:
The osphradium of Pila globosa is a **chemoreceptor**.