HOSA Dental Terminology Practice

What describes the basal layer of epithelial tissue?

1. It is the outermost layer of cells

2. It comprises flat shaped cells tightly packed

3. It is the deepest layer formed by cube-shaped cells

4. It has no direct contact with underlying tissues

The correct answer is: It is the deepest layer formed by cube-shaped cells

The basal layer of epithelial tissue is accurately described as the deepest layer formed by cube-shaped cells. This layer, known as the basal layer or basal cell layer, is vital in providing a foundation for the subsequent layers of epithelial cells. It is primarily composed of cuboidal or columnar cells that are responsible for the regeneration of the epithelial tissue on the surface as older cells move up and are shed. This regenerative capacity is essential for maintaining the integrity and function of the epithelial barrier, whether it's on the skin, in organs, or lining cavities. The basal layer also plays a crucial role in anchoring the epithelial tissue to the underlying connective tissue, which is necessary for nutrient exchange and structural support. As for the other options, they do not accurately reflect the nature of the basal layer. It's not the outermost layer, nor does it consist of flat-shaped cells, and it does have direct contact with the underlying tissue, contrary to what that option suggests. Understanding the characteristics and functions of the basal layer is important for comprehending overall epithelial tissue structure and function.