Hydra receives impulses and stimuli through

Options

A. nerve net
B. nematocytes
C. sensory cells
D. neuron cells.

Answer

To answer the question "Hydra receives impulses and stimuli through," we will analyze the options provided and determine the correct answer step by step.

### Step 1: Understand Hydra's Nervous System
Hydra has a unique nervous system known as a diffuse nervous system. This means that it does not have a centralized brain or nerve cord like more complex organisms. Instead, its nerve cells are spread throughout its body.

**Hint:** Recall the structure of Hydra and how its nervous system differs from that of more complex animals.

### Step 2: Analyze the Options
Let's look at the options given:
- **Option A: Nerve Neck** - This term is not commonly associated with Hydra's nervous system.
- **Option B: Nematocytes** - These are specialized cells used for capturing prey and defense, not for receiving impulses or stimuli.
- **Option C: Sensory Cells** - These cells are responsible for detecting stimuli from the environment.
- **Option D: Neuron Cells** - While Hydra does have nerve cells, the term "neuron cells" is too broad and does not specifically indicate the type of cells that receive stimuli.

**Hint:** Focus on the function of each type of cell mentioned in the options.

### Step 3: Identify the Correct Answer
Based on the analysis, the correct option is **C: Sensory Cells**. These cells are located in the gastrodermis of Hydra and play a crucial role in receiving stimuli from the environment.

**Hint:** Consider the role of sensory cells in organisms and how they relate to the reception of stimuli.

### Final Answer
Hydra receives impulses and stimuli through **sensory cells**.