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Question

Basement membrane is composed of

A
Hyaluronic acid and glycoproteins
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B
Only mucopolysacharides
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C
Endodermal cells
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D
Epidermal cells
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Solution

The correct option is A Hyaluronic acid and glycoproteins
The basement membrane is a thin, fibrous matrix of tissue which is extracellular and that separates the epithelium (skin, respiratory tract, gastrointestinal tract, etc.), mesothelium (pleural cavity, peritoneal cavity, pericardial cavity, etc.) and endothelium (blood vessels, lymph vessels, etc.) from underlying connective tissue.
The basement membrane is the fusion of two laminae namely, the basal lamina and the reticular lamina. The lamina reticularis is attached to the basal lamina with collagen VII anchoring fibrils and fibrillin microfibrils. The two layers together are collectively referred to as the basement membrane.
The basement membrane is composed of interstitial collagen types I, II and III, fibronectin, elastin, proteoglycans, hyaluronic acid and other glycoproteins.

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