Nematoblasts of Hydra help in

Options

A. Attracting prey
B. Detecting prey
C. Paralysing prey
D. None of the above.

Answer

**Step-by-Step Solution:**

1. **Understanding Nematoblasts**: Nematoblasts, also known as cnidocytes or stinging cells, are specialized cells found in members of the phylum Cnidaria, which includes organisms like Hydra.

2. **Location of Nematoblasts**: These cells are located on the body and tentacles of Hydra. Their strategic placement allows them to effectively perform their functions.

3. **Functions of Nematoblasts**: The primary functions of nematoblasts include:
- **Defense**: They protect the organism from predators.
- **Prey Capture**: They are used to capture prey by immobilizing them.

4. **Mechanism of Action**: When a potential prey comes into contact with the tentacles of Hydra, mechanical or chemical stimuli trigger the nematoblasts. This can be a simple touch or other interactions.

5. **Discharge of Neurotoxin**: Upon stimulation, the nematoblasts discharge a thread-like structure that contains neurotoxin. This neurotoxin is responsible for paralyzing the prey, making it easier for the Hydra to consume it.

6. **Conclusion**: Therefore, the primary role of nematoblasts in Hydra is to paralyze the prey, which aids in capturing it for feeding.

**Final Answer**: Nematoblasts of Hydra help in paralyzing the prey.

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