What separates the epithelial cell layer from the basement membrane?

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Multiple Choice

What separates the epithelial cell layer from the basement membrane?

Myoepithelial cells sit at the interface between the secretory epithelial cells and the basement membrane in many exocrine glands. Their basal surface rests on the basement membrane while their cytoplasm envelops the epithelial cells, effectively forming the separating layer between the two. This arrangement, plus their contractile ability to squeeze secretions toward ducts, is why they’re described as the separating cell type at that boundary. Elastic fibers are just connective tissue components, endothelial cells line blood vessels, and the basement membrane is the boundary itself—not something that sits between the two.

Myoepithelial cells sit at the interface between the secretory epithelial cells and the basement membrane in many exocrine glands. Their basal surface rests on the basement membrane while their cytoplasm envelops the epithelial cells, effectively forming the separating layer between the two. This arrangement, plus their contractile ability to squeeze secretions toward ducts, is why they’re described as the separating cell type at that boundary. Elastic fibers are just connective tissue components, endothelial cells line blood vessels, and the basement membrane is the boundary itself—not something that sits between the two.

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