A basal lamina is a thin layer of extracellular matrix consisting primarily of glycoproteins and collagen fibers that underlies and supports epithelial cells. It separates the epithelial cells from underlying connective tissue and plays a critical role in providing structural support, cell adhesion, and regulating cell behavior.

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A Basal Lamina

Question 4

Multiple Choice

A basal lamina

A) is a thin layer of connective-tissue cells and matrix underlying an epithelium.
B) is a thin layer of extracellular matrix underlying an epithelium.
C) is attached to the apical surface of an epithelium.
D) separates epithelial cells from each other.

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