22 Questions
What is the function of the basal lamina for epithelial cells?
It contains receptors for bloodborne factors
How do epithelial cells repair themselves after damage?
By forming new cells through mitosis
What type of collagen fibers make up the reticular lamina?
Type III collagen fibers
Why does the basal surface of epithelial cells often contain receptors for bloodborne factors?
Because it is closest to the blood supply
Where are tight junctions located in relation to epithelial cells?
Immediately beneath the luminal surface
What is the function of desmosomes?
Provide strong attachment between adjacent cells
Where are gap junctions located in epithelial cells?
Directly between adjacent cells
What is the function of hemidesmosomes?
Bind the base of the cell to the basement membrane
Which surface extension greatly increases the surface area of an absorptive cell?
Villi
In which epithelial type can microvilli be found on the apical surface?
Simple columnar epithelium
How is the naming convention for epithelium determined when it contains flat, cuboidal, and columnar cells ?
By the shape of the outermost layer of cells
Which type of epithelium consists of flattened cells and forms a single layer?
Simple squamous epithelium
Which of the following is a main function of the apical surface specializations in epithelial cells?
Secretion
Which of the following is NOT a type of intercellular junction found in epithelial cells?
Synapses
What is the function of the basement membrane in epithelial tissue?
Separates epithelium from underlying tissue
Which type of collagen is mainly found in the basal lamina of epithelial cells?
Type IV collagen
Which structure is responsible for movement on the apical surface of epithelial cells?
Cilia
Which type of epithelium is usually confined to the lining of larger excretory ducts of exocrine glands?
Stratified Cuboidal Epithelium
In which part of the body would you most likely find Pseudostratified Epithelium?
Respiratory tract like trachea
What creates the illusion of cellular stratification in Pseudostratified Epithelium?
Different levels of nuclei in cells
Which epithelium undergoes transitions in cell shape depending on the degree of stretch?
Transitional Epithelium
Where is Simple Columnar Epithelium most often found?
Small intestine
This quiz covers the characteristics of epithelium, including basal lamina, basement membrane, intercellular junctions, cilia, microvilli, and classification of epithelia. Suitable for students studying Basic Science at COSHP, KSAU-HS, KSA.
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