The layer of cells forming tissue that appears to be multilayered but actually some of the cells extend from the basement membrane to the surface is

Options

A. Simple columnar epithelium
B. Pseudostratified epithelium
C. Stratified columnar epithelium
D. Stratified cuboidal epithelium

Answer

To solve the question regarding the type of epithelial tissue that appears multilayered but is actually single-layered, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Epithelial Tissue**: Epithelial tissues are layers of cells that cover surfaces, line cavities, and form glands. They can be classified based on the number of cell layers and the shape of the cells.

2. **Classification of Epithelial Tissue**: Epithelial tissues are broadly classified into two categories:
- **Simple Epithelium**: Composed of a single layer of cells.
- **Stratified Epithelium**: Composed of multiple layers of cells.

3. **Identifying the Types of Simple Epithelium**:
- **Simple Squamous Epithelium**: Flat cells in a single layer.
- **Simple Cuboidal Epithelium**: Cube-shaped cells in a single layer.
- **Simple Columnar Epithelium**: Tall, column-like cells in a single layer.
- **Pseudostratified Epithelium**: Appears to be multilayered due to varying cell heights but is actually a single layer.

4. **Focus on Pseudostratified Epithelium**: The key characteristic of pseudostratified epithelium is that it has cells of different heights, which gives it a false appearance of being stratified. However, all cells are attached to the basement membrane, making it a single layer.

5. **Conclusion**: Based on the characteristics discussed, the type of epithelial tissue that appears multilayered but is actually a single layer is **Pseudostratified Epithelium**.

### Final Answer:
The layer of cells forming tissue that appears to be multilayered but actually some of the cells extend from the basement membrane to the surface is **Pseudostratified Epithelium**.

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