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Questions and Answers
Which of the following is NOT a characteristic of epithelial tissue?
Which of the following is NOT a characteristic of epithelial tissue?
- Avascular
- High vascularity (correct)
- Covers external surfaces
- Lines internal closed cavities
Epithelial tissue forms the secretory portion of glands and their ducts.
Epithelial tissue forms the secretory portion of glands and their ducts.
True (A)
What are the three distinct surface domains of epithelial cells?
What are the three distinct surface domains of epithelial cells?
Apical, lateral, basal
Epithelial tissue rests on an underlying ______ that is a non-cellular protein-polysaccharide-rich layer.
Epithelial tissue rests on an underlying ______ that is a non-cellular protein-polysaccharide-rich layer.
Match the following characteristics with their corresponding descriptions:
Match the following characteristics with their corresponding descriptions:
Flashcards
Epithelial Tissue
Epithelial Tissue
Epithelial tissue is a type of tissue that covers the external surfaces of the body and lines internal cavities like the digestive tract. It forms glands and their ducts, and also constitutes certain sensory organs.
Epithelial Tissue is Avascular
Epithelial Tissue is Avascular
Epithelial tissue is avascular, meaning it lacks blood vessels. It relies on the underlying connective tissue for its nutrient supply.
Surface Domains in Epithelial Cells
Surface Domains in Epithelial Cells
Epithelial cells exhibit distinct surface domains, these are specialized regions with unique characteristics:
- Apical (free) surface: Faces the external environment or lumen.
- Lateral surface: Interacts with adjacent cells via junctions.
- Basal surface: Anchors to the underlying basement membrane.
Epithelial Cell Junctions
Epithelial Cell Junctions
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Epithelial Basal Lamina
Epithelial Basal Lamina
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Study Notes
Epithelial Tissue
- Lacking blood vessels (avascular)
- Covers external body surfaces
- Lines internal closed body cavities
- Forms the secretory parts of glands and their ducts
- Makes up the receptors of certain sensory organs
Epithelial Cell Characteristics
- Arranged in sheets
- Possess intercellular junctions (junctional complexes)
- Display distinct surface domains:
- Apical (free)
- Lateral
- Basal
- Properties determined by specific membrane proteins
- Rest on a basal lamina
- Non-cellular
- Protein-polysaccharide-rich layer
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