Question
Download Solution PDFWhich of the following is a function of epithelial tissues?
This question was previously asked in
RRB Technician Grade III Official Paper (Held On: 29 Dec, 2024 Shift 2)
Answer (Detailed Solution Below)
Option 2 : Protection
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Download Solution PDFThe correct answer is 2) Protection.
Key Points
- Epithelial tissues act as a protective barrier against mechanical injury, pathogens, and chemical exposure.
- They cover the body surface and line body cavities, providing a first line of defense.
- Specialized epithelial cells, like those in the skin, prevent water loss and protect against environmental damage.
- Certain epithelial cells have cilia and mucous production capabilities to trap and remove foreign particles.
Additional Information
- Types of Epithelial Tissues:
- Squamous Epithelium: Thin and flat cells that facilitate diffusion and filtration.
- Cuboidal Epithelium: Cube-shaped cells that function in secretion and absorption.
- Columnar Epithelium: Tall and column-like cells specialized for absorption and secretion.
- Functions Beyond Protection:
- Absorption: Epithelial cells in the intestines absorb nutrients from food.
- Secretion: Glandular epithelial cells produce and release substances like enzymes and hormones.
- Sensory Reception: Certain epithelial cells are involved in sensory perception, such as taste buds on the tongue.
- Regeneration:
- Epithelial tissues have a high capacity for regeneration, allowing for quick repair of injuries.
- This regenerative ability is crucial for maintaining the integrity of barriers and surfaces.
- Basement Membrane:
- A thin, fibrous layer that supports epithelial cells and anchors them to underlying connective tissue.
- The basement membrane is essential for tissue stability and cell signaling.
Last updated on Jun 30, 2025
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