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प्रश्न
Name the different cell junctions found in tissues.
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उत्तर
Different cell junctions that are found in tissues are:-
- Tight junctions: Here the plasma membrane of adjacent epithelial cells are held close together.
- Gap junctions: They are formed for the exchange of chemicals between adjacent cells.
- Adhering junctions: As the name suggests they stick together the neighbouring cells.
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संबंधित प्रश्न
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.
The following statement is wrong. Rewrite it correctly by changing either one or two words.
Simple squamous epithelium is present in respiratory tract.
Name one place in living organisms where the following tissue is located:
Ciliated epithelium
Name the kind of cells found in the following place:
Inner lining of the wind pipe
The main function of the cuboidal epithelium is
Some epithelia are pseudostratified. What does this mean?
Nerve cell does not contain
Write true (T) or false (F)
The lining of blood vessels, lung alveoli and kidney tubules are all made up of epithelial tissue.
Write true (T) or false (F)
Epithelial layer is permeable layer.
Give reasons for
Intercellular spaces are absent in sclerenchymatous tissues.
Glandular epithelium gives a stratified appearance.
Write one point of difference between
Simple and compound epithelial tissue.
Write the salient features of the compound epithelium.
Explain simple epithelium and its types.
Identify the following relationship
Cuboidal: Epithelial
Cardiac: ______
Granulocytes: ______
Osteocytes: ______
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.
Which one of the following types of cell is involved in making of the inner walls of blood vessels?
Stratified epithelial cells have limited role in secretion. Justify their role in our skin.
How does a gap junction facilitate intercellular communication?
