Which of the following receptors is incorrectly paired with its category?

Options

A. Hair cell-mechanoreceptor
B. Gustatory receptor-chemoreceptor
C. Rod-photoreceptor
D. Nociceptor-deep pressure receptor

Explanation

To solve the question "Which of the following receptors is incorrectly paired with its category?", we will analyze each receptor and its corresponding category step by step.

### Step 1: Understand the Receptors
We need to identify each receptor and its classification:
1. **Hair Cell** - Mechanoreceptor
2. **Gustatory Receptor** - Chemoreceptor
3. **Rod** - Photoreceptor
4. **Nociceptor** - Deep Pressure Receptor

### Step 2: Analyze Each Pair
1. **Hair Cell - Mechanoreceptor**:
- Hair cells are indeed mechanoreceptors as they respond to mechanical stimuli such as sound vibrations.
- **Conclusion**: This pairing is correct.

2. **Gustatory Receptor - Chemoreceptor**:
- Gustatory receptors are responsible for taste and are classified as chemoreceptors since they respond to chemical substances.
- **Conclusion**: This pairing is correct.

3. **Rod - Photoreceptor**:
- Rods are a type of photoreceptor that detects light and are crucial for vision in low-light conditions.
- **Conclusion**: This pairing is correct.

4. **Nociceptor - Deep Pressure Receptor**:
- Nociceptors are sensory receptors that respond to pain (damaging stimuli) and are not specifically designed to detect deep pressure. Deep pressure receptors are a separate category that responds to pressure rather than pain.
- **Conclusion**: This pairing is incorrect.

### Step 3: Identify the Incorrect Pair
Based on the analysis, the incorrectly paired receptor is:
- **Nociceptor - Deep Pressure Receptor**.

### Final Answer
The incorrectly paired receptor is **Nociceptor - Deep Pressure Receptor**.

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