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प्रश्न
Answer the following question.
Describe different types of cell junctions.
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उत्तर
The different types of cell junctions are as follows:
- Gap Junctions (GJs):
These are intercellular connections that allow the passage of ions and small molecules between cells as well as the exchange of chemical messages between cells. - Adherens Junctions (AJs):
They are involved in various signalling pathways and transcriptional regulations. - Desmosomes (Ds):
They provide mechanical strength to epithelial tissue, cardiac muscles and meninges. - Hemidesmosomes (HDs):
They allow the cells to strongly adhere to the underlying basement membrane. These junctions help maintain tissue homeostasis by signalling. - Tight junctions (TJs):
These junctions maintain cell polarity, prevent lateral diffusion of proteins and ions.
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संबंधित प्रश्न
Distinguish between Simple epithelium and compound epithelium
Name one place in living organisms where the following tissues is located:
Squamous epithelium
Name the tissues found:
at the inner lining of the trachea.
Some epithelia are pseudostratified. What does this mean?
Write true (T) or false (F)
The lining of blood vessels, lung alveoli and kidney tubules are all made up of epithelial tissue.
Describe the structure and function of different types of epithelial tissues. Draw diagram of each type of epithelial tissue.
Give reasons for
Intercellular spaces are absent in sclerenchymatous tissues.
The ______ epithelium is also known as the pavement membrane.
______ epithelium is seen in sweat glands.
How does a gap junction facilitate intercellular communication?
