Epithelium lining bronchiole is

Options

A. Columnar and cuboidal
B. Pseudostratified and sensory
C. Squamous and sensory
D. Pseudostratified and columnar.

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the type of epithelium that lines the bronchioles in the respiratory system.

2. **Identifying the Structure**: Bronchioles are the smaller branches of the bronchi and are part of the respiratory system. They play a crucial role in conducting air to the alveoli for gas exchange.

3. **Types of Epithelium in Bronchioles**: The epithelium lining the bronchioles is primarily simple columnar and/or cuboidal. This epithelium can be either ciliated or non-ciliated.

4. **Analyzing the Options**:
- **Option 1: Columnar and Cuboidal**: This is consistent with the known structure of bronchioles.
- **Option 2: Pseudostratified and Sensory**: Pseudostratified epithelium is typically found in larger airways like the trachea and primary bronchi, not in bronchioles. Sensory cells are not present in bronchioles.
- **Option 3: Squamous and Sensory**: Squamous epithelium is found in areas like the alveoli and does not pertain to bronchioles. Sensory cells are also not relevant here.
- **Option 4: Pseudostratified and Columnar**: While pseudostratified epithelium is found in parts of the respiratory tract, it is not the type found in bronchioles.

5. **Conclusion**: The correct answer is **Option 1: Columnar and Cuboidal** epithelium, as it accurately describes the epithelium lining the bronchioles.

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