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प्रश्न
Some epithelia are pseudostratified. What does this mean?
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उत्तर
Pseudostratified epithelial cells are columnar but unequal in size. Although the epithelium is single-layered yet it appears to be multilayered due to the fact that nuclei lie at different levels in different cells.
संबंधित प्रश्न
Distinguish between Simple epithelium and compound epithelium
Based on the following information, identify the three types of epithelial tissue in the figures given below :
| a |  |
b |  |
c |  |
(1) Cuboidal epithelium: It consists of a single layer of cuboidal cells.
(2) Columnar epithelium: It is composed of tall, cylindrical cells with oval nuclei usually placed at the base of the cells.
(3) Ciliated epithelium: It consists of cells being hair-like cilia on their free surface.
Name one place in living organisms where the following tissue is located:
Ciliated epithelium
Name the tissues found
at the outer layer of skin.
Name the tissues found:
at the inner lining of the trachea.
Name the tissues found:
in the testes and ovaries.
Answer the following question.
Describe different types of cell junctions.
The ciliated epithelium lines the______.
Prevention of substances from leaking across the tissue is provided by ______.
Name any four important functions of epithelial tissue and provide at least one example of a tissue that exemplifies each function.
Fats are stored in human body as
If a potted plant is covered with a glass jar, water vapours appear on the wall of glass jar. Explain why?
Write true (T) or false (F)
Epithelial layer is permeable layer.
Write true (T) or false (F)
Epithelial layer does not allow regulation of materials between body and external environment.
Give reasons for
Meristematic cells have a prominent nucleus and dense cytoplasm but they lack vacuole.
Glandular epithelium gives a stratified appearance.
Identify the following relationship
Cuboidal: Epithelial
Cardiac: ______
Granulocytes: ______
Osteocytes: ______
Which type of tissue CORRECTLY matches with its location?
How does a gap junction facilitate intercellular communication?
Classify and describe epithelial tissue on the basis of structural modifications of cells.
