Choose the incorrect match between receptors their functions and examples

Options

A. Receptor 1.Mechanoreceptors Function Detect mechanical stimuli Examples Meissner's corpuscles, Pacinian corpuscles
B. Photoreceptors Function Detect visual stimuli Example Retina ommatidia
C. Thermoreceptors Detect temperature changes Example end bulb of Krause Ruffinis organ in skin
D. Chemoreceptors Function Detect chemical stimuli Example Nerve endings Neuromost organs

Answer

To solve the question of choosing the incorrect match between receptors, their functions, and examples, we will analyze each option step by step.

### Step-by-Step Solution:

1. **Identify the Receptor and Its Function**:
- The first receptor type is **mechanoreceptors**. Their function is to **detect mechanical stimuli**.

2. **Check Examples for Mechanoreceptors**:
- The examples given are **Meissner's corpuscles** and **Pacinian corpuscles**.
- **Meissner's corpuscles** are responsible for detecting touch and low-frequency vibrations, while **Pacinian corpuscles** detect transient pressure and high-frequency vibrations.
- This match is **correct**.

3. **Identify the Next Receptor Type**:
- The second receptor type is **photoreceptors**. Their function is to **detect visual stimuli**.

4. **Check Examples for Photoreceptors**:
- The examples provided are **retina** and **omatidia**.
- The retina contains photoreceptors (rods and cones) that detect light, and omatidia are found in compound eyes of insects, which also detect light.
- This match is **correct**.

5. **Identify the Third Receptor Type**:
- The third receptor type is **thermoreceptors**. Their function is to **detect temperature changes**.

6. **Check Examples for Thermoreceptors**:
- The examples given are **end bulbs of Krause** and **Ruffini's organs**.
- End bulbs of Krause are involved in detecting cold, while Ruffini's endings are involved in detecting heat and sustained pressure.
- This match is **correct**.

7. **Identify the Last Receptor Type**:
- The fourth receptor type is **chemoreceptors**. Their function is to **detect chemical stimuli**.

8. **Check Examples for Chemoreceptors**:
- The examples provided are **nerve endings** and **neuromuscular organs**.
- However, these are not specific examples of chemoreceptors. Chemoreceptors are typically found in taste buds and olfactory receptors, not nerve endings or neuromuscular organs.
- This match is **incorrect**.

### Conclusion:
The incorrect match is for **chemoreceptors**, where the function is to detect chemical stimuli, but the examples given (nerve endings and neuromuscular organs) do not accurately represent chemoreceptors. Therefore, the answer is option **D**.