8- A digestive mucosa: A. Is made up of an epithelium and a chorion. B. Is made up of an epithelium and a basement membrane. C. Is made up of an epithelium and mesenchymal cells. D. Never renews itself. E. Is made up of a transitional epithelium. F. Is made up of an epithelium and blood vessels. G. Is not innervated H. Is not vascularized
Question
8- A digestive mucosa: A. Is made up of an epithelium and a chorion. B. Is made up of an epithelium and a basement membrane. C. Is made up of an epithelium and mesenchymal cells. D. Never renews itself. E. Is made up of a transitional epithelium. F. Is made up of an epithelium and blood vessels. G. Is not innervated H. Is not vascularized
Solution
A digestive mucosa:
A. Is made up of an epithelium and a chorion. - This is true. The digestive mucosa is composed of an epithelium, which is the layer of cells that lines the digestive tract, and a chorion, which is a layer of connective tissue.
B. Is made up of an epithelium and a basement membrane. - This is also true. The basement membrane is a thin layer of extracellular matrix that separates the epithelium from the underlying tissues.
C. Is made up of an epithelium and mesenchymal cells. - This is not true. Mesenchymal cells are a type of stem cell that can differentiate into a variety of cell types, but they are not a component of the digestive mucosa.
D. Never renews itself. - This is not true. The cells of the digestive mucosa are constantly being replaced as they are worn away by the passage of food.
E. Is made up of a transitional epithelium. - This is not true. The digestive mucosa is lined with a simple columnar epithelium, not a transitional epithelium.
F. Is made up of an epithelium and blood vessels. - This is true. The chorion contains blood vessels that supply the epithelium with nutrients and oxygen.
G. Is not innervated - This is not true. The digestive mucosa is innervated by the enteric nervous system, which controls the movement of the digestive tract.
H. Is not vascularized - This is not true. As mentioned above, the chorion contains blood vessels, so the digestive mucosa is vascularized.
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