Question

Basement membrane is made up of

• A. no cell product of epithelial cell
• B. epidermal cell only and
• C. endodennal cell
• D. both

Answer 1

The Correct Option is A

Basement membrane (basal lamina) is a thin sheet of fibrous proteins that underlies and supports the cells of an epithelium, separating this from underlying tissue. Basement membranes are components of the extracellular matrix (the viscous watery fluid that surrounds cells in animal tissue) and help to regulate passage of materials between epithelial cells and adjacent blood vessels. Each consists of a framework of collagen fibrils within which are glycosaminoglycans (mucopolysacc harides) and laminins, which are proteins that bind the basement membrane to neighbouring cells via cell adhesion molecules.