Question

Which of the following is not a characteristic of epithelial tissue?

• A. Epithelium tissue has the capability of regeneration
• B. Epithelial tissue cells lie on a basement membrane
• C. The basement of the tissue is non-cellular, supporting the underlying structures
• D. None of the above

Answer 1

The correct option is D

None of the above

Answer: (4) None of the above

Epithelial Tissue

Epithelial tissue or epithelium forms the outer covering of the skin and also lines the body cavity. It forms the lining of respiratory, digestive, reproductive and excretory tracts. They perform various functions such as absorption, protection, sensation and secretion. Epithelial tissue rests on an extracellular basement membrane.

Functions of Epithelial Tissue

The main functions of epithelial tissue are protection, secretion, absorption, exchange of gases and sensation.

• Protection: As it covers the entire body surface, it is the first layer of defence against any kind of mechanical injury, chemical exposure, excessive fluid loss and infections.
• Secretion: Various glands are made up of epithelial cells that secrete hormones, enzymes, saliva, mucus, sweat, etc.
• Absorption: The epithelial lining of the digestive tract absorbs water and nutrients and helps in the proper functioning of the body.
• Exchange of substances: Epithelial tissue coordinates the exchange of substances between the body and external environment as well as the internal exchange between various parts of the body.
• Sensation: Sensory receptors are present in the epithelial tissue of the nose, eyes and ears, taste bud, etc. that help in transmitting signals from the external stimuli to the brain.