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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
Describe various types of epithelial tissues with the help of labelled diagrams
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.
How many types of epithelial tissues have you studied? Write their functions.
Give structure, types and functions in brief of the following:
Epithelial tissue
Name the tissues found:
at the inner lining of the trachea.
The main function of the cuboidal epithelium is
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.
Which is not a function of epidermis?
Give reasons for
Intercellular spaces are absent in sclerenchymatous tissues.
In a certain type of cell division, the diploid number of chromosomes is reduced to half. This kind of division occurs in ______.
______ epithelium is seen in sweat glands.
Glandular epithelium gives a stratified appearance.
Assertion: Materials are exchanged between epithelial and connective tissues by diffusion.
Reason: Blood vessels are absent in epithelial tissue.
Explain simple epithelium and its types.
Which type of tissue CORRECTLY matches with its location?
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.
