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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.
Fill in the blank
Epithelial tissue is made of cells without any ...................... spaces.
The following statement is wrong. Rewrite it correctly by changing either one or two words.
Glandular epithelium is present in kidneys.
Name one place in living organisms where the following tissues is located:
Squamous epithelium
Name the kind of cells found in the following place:
Inner lining of the wind pipe
How many types of epithelial tissues have you studied? Write their functions.
Answer the following question.
What is cell junction?
Name any four important functions of epithelial tissue and provide at least one example of a tissue that exemplifies each function.
What is an epithelium? Enumerate the characteristic features of different epithelia.
Intestine absorb the digested food materials. What type of epithelial cells are responsible for that?
A long tree has several branches. The tissue that helps in the side ways conduction of water in the branches is
Write true (T) or false (F)
The lining of blood vessels, lung alveoli and kidney tubules are all made up of epithelial tissue.
______ epithelium is seen in sweat glands.
Write the salient features of the compound epithelium.
Identify the following relationship
Cuboidal: Epithelial
Cardiac: ______
Granulocytes: ______
Osteocytes: ______
Epithelium founds in the lining of stomach and intestine is
Identify the types of cell junctions that help to stop the leakage of the substances across tissue and facilitation of communication with neighbouring cells via rapid transfer of ions and molecules.
The body of sponges does not possess tissue level of organisation though it is made of thousands of cells. Comment.
Classify and describe epithelial tissue on the basis of structural modifications of cells.
