An apical surface is a surface that faces the lumen which is the inner cavity of an organ. An organ of structure also has a basal side which faces the basement membrane and is commonly in contact with connective tissue or muscle tissue below it. Help improve Study.com.
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What is the apical surface?
The apical surface of epithelial cells, which lines the lumen of sac- and tube-shaped organs and the inner surfaces of the body cavities, forms the interface between the extracellular milieu and underlying tissues.
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Where is the apical surface of the skin?
The apical surface faces the lumen (inside of a hollow organ) while the basal or basolateral surface is adjacent to the underlying tissue. In many epithelia, the apical surface is specialized.
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What is the difference between apical and basal surface?
Epithelial have two functionally and biochemically different surfaces. The apical faces external environment or lumen of a tube where it is often involved in absorption or secretion. The basal mediates attachment to underlying tissue or surface via integrins.
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What is the meaning of basal surface?
The basal surface is the surface opposite the apical surface, and also describes the deepest cell layer in epithelia with multiple cell layers. The cells of the basal surface adhere to the basement membrane, anchored by hemidesmosomes.
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What is meant by apical surface?
The apical surface of epithelial cells, which lines the lumen of sac- and tube-shaped organs and the inner surfaces of the body cavities, forms the interface between the extracellular milieu and underlying tissues.
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Where is the apical surface of the skin?
The apical surface faces the lumen (inside of a hollow organ) while the basal or basolateral surface is adjacent to the underlying tissue. In many epithelia, the apical surface is specialized.
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What is the basal surface?
In histology, the basal surface is the bottom edge of the cell or tissue adjacent to the basement membrane. In particular, the epithelial tissue is a group of cells (called epithelial cells) that lie together to carry out a common function. The epithelial tissue acts as a covering.
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What is the apical surface of the cell membrane?
The apical plasma membrane is a free surface that is exposed to the luminal fluid. The basal plasma membrane is attached to an extracellular matrix that supports the epithelial tissue.
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What is the difference between apical and basal cell surface?
The apical surface faces the lumen (inside of a hollow organ) while the basal or basolateral surface is adjacent to the underlying tissue. In many epithelia, the apical surface is specialized.
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What is apical or basal?
In epithelia, the apical surface faces the external environment or lumen of the tissue and the basal surface faces the basement membrane. The apical surface often features specialized protrusions such as microvilli and cilia.
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What has a basal and apical surface?
An epithelium has a free surface, the apical surface, exposed to the outside, and an attached surface, the basal surface, resting on the underlying connective tissue.
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What is the difference between apical and basolateral membrane?
The plasma membrane of epithelia is differentiated into two domains that have different lipid and protein composition. The apical membrane is highly enriched in glycosphingolipids, while the basolateral membrane contains higher concentration of phosphatidyl choline and sphingomyelin (Simons and van Meer, 1988).
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What is the apical surface of the skin?
The apical surface of epithelial cells, which lines the lumen of sac- and tube-shaped organs and the inner surfaces of the body cavities, forms the interface between the extracellular milieu and underlying tissues.
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Where is apical and basal surface?
The bottom edge of the epithelial tissue next to the basement membrane is the basal surface. In contrast, the edge of the epithelial tissue facing the lumen or the external environment is called the apical surface.
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What tissues have an apical surface?
Epithelial tissues are found on the surfaces of all organs inside and out of the human body and as such, epithelial tissues have one edge not connected to other cells, the apical surface.
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What is the difference between apical and basal surface?
Epithelial have two functionally and biochemically different surfaces. The apical faces external environment or lumen of a tube where it is often involved in absorption or secretion. The basal mediates attachment to underlying tissue or surface via integrins.
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What does apical and basal surface mean?
The apical surface faces the lumen (inside of a hollow organ) while the basal or basolateral surface is adjacent to the underlying tissue. In many epithelia, the apical surface is specialized.
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What is the basal surface of epithelial cells?
At the basal surface of epithelial cells are located: The basement membrane, a thin non-cellular layer, intervenes between the epithelium and the connective tissue. This membrane is 30 to 60 nanometers thick and made up of collagenous and non-collagenous glycoproteins and proteoglycans.
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What does basal mean in histology?
(BAY-sul sel) A small, round cell found in the lower part (or base) of the epidermis, the outer layer of the skin. Enlarge. Anatomy of the skin showing the epidermis (including the squamous cell and basal cell layers), dermis, subcutaneous tissue, and other parts of the skin.
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What is the function of basal surface?
The basal lamina provides support to the overlying epithelium, limits contact between epithelial cells and the other cell types in the tissue and acts as a filter allowing only water and small molecules to pass through.
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