10 Questions
Which of the following is a function of epithelial tissue?
Protection, absorption, filtration, and secretion
What is the main role of the apical surface of epithelial cells?
Being the free surface exposed to the body's exterior or body cavity
How are epithelial cells bound together?
Continuous sheets bound together by cell junctions
What is the role of the basement membrane in epithelial tissue?
Providing a structure for the basal surface of epithelium to rest on
Why are epithelial tissues considered avascular?
They have no blood supply and depend on diffusion from underlying capillaries
What is the main function of epithelial tissue?
Protection, absorption, filtration, and secretion
What is the role of the basement membrane in epithelial tissue?
To anchor the epithelial tissue to underlying connective tissue
What is the characteristic of the apical surface of epithelial cells?
Exposed to the body's exterior or body cavities
Why are epithelial tissues considered avascular?
They depend on diffusion from the capillaries in underlying connective tissue
How do epithelial cells fit together to form continuous sheets?
By fitting closely together and being bound by cell junctions
Study Notes
Epithelial Tissue Functions
- Protects the body from external damage and infection
- Regulates the exchange of substances between the body and the environment
- Produces hormones and other secretions
Epithelial Cell Structure
- The apical surface of epithelial cells faces the external environment or a body cavity
- The apical surface is specialized for absorption, secretion, or sensation
- Epithelial cells are bound together by tight junctions, desmosomes, and adherens junctions
Basement Membrane
- A thin layer of fibrous tissue that separates epithelial tissue from underlying connective tissue
- Provides structural support and regulates the movement of molecules between the two tissues
Characteristics of Epithelial Tissue
- Avascular, meaning they do not have a direct blood supply
- Receive oxygen and nutrients by diffusion from nearby blood vessels
- Form continuous sheets that cover the body surface and line body cavities
Test your knowledge of epithelial tissue with this quiz! Learn about its functions, structure, and importance as the body's protective boundary.
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