Questions and Answers
What is the description of nonciliated simple columnar epithelium?
What types of cells are present in nonciliated simple columnar epithelium?
Columnar epithelial cells and goblet cells
Nonciliated simple columnar epithelium lines the ______.
gastrointestinal tract
Where is nonciliated simple columnar epithelium located?
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What are the main functions of nonciliated simple columnar epithelium?
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The main function of nonciliated simple columnar epithelium is absorption only.
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Study Notes
Nonciliated Simple Columnar Epithelium Overview
- Composed of a single layer of column-like cells with oval nuclei at the base.
- Features two main cell types:
- Columnar epithelial cells with microvilli on the apical surface.
- Goblet cells that secrete mucus.
Microvilli and Goblet Cells
- Microvilli are finger-like projections that enhance plasma membrane surface area, facilitating absorption.
- Goblet cells, modified columnar cells, produce mucus, which appears as a bulge in the cell due to mucus accumulation.
Location
- Found lining the gastrointestinal tract, from the stomach to the anus.
- Present in ducts of various glands and the gallbladder.
Functions
- Role in secretion and absorption processes.
- Larger columnar cells possess more organelles, enabling enhanced secretion and absorption compared to cuboidal cells.
- Secreted mucus acts as a lubricant for the linings of digestive, respiratory, reproductive, and most urinary tracts.
- Mucus protects the stomach lining from damage caused by acidic gastric juices.
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Description
Explore the structure and function of nonciliated simple columnar epithelium with these informative flashcards. Learn about the unique features such as microvilli and goblet cells, and their roles in increasing surface area and mucus secretion. Ideal for students studying histology and cell biology.
