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प्रश्न
How does a gap junction facilitate intercellular communication?
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उत्तर
A gap junction facilitates intercellular communication by allowing the small signalling molecules to pass from cell to cell. These are hydrophilic junctions that are made up of two protein cylinders called connexus. The movement of molecules through this channel is controlled by PH and Ca2+ions Concentration.
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संबंधित प्रश्न
Describe various types of epithelial tissues with the help of labelled diagrams
The following statement is wrong. Rewrite it correctly by changing either one or two words.
Glandular epithelium is present in kidneys.
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.
Name the tissues found
at the outer layer of skin.
Name the tissues found:
in the testes and ovaries.
Answer the following question.
Describe different types of cell junctions.
Epithelial cells with cilia are found in ______ of our body.
Lining of small intestine is made up of ______.
Prevention of substances from leaking across the tissue is provided by ______.
Some epithelia are pseudostratified. What does this mean?
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
Write true (T) or false (F)
Epithelial cells have a lot of intercellular spaces.
Write true (T) or false (F)
Epithelial layer is permeable layer.
Give reasons for
Meristematic cells have a prominent nucleus and dense cytoplasm but they lack vacuole.
Give reasons for
Intercellular spaces are absent in sclerenchymatous tissues.
______ epithelium is seen in sweat glands.
Write one point of difference between
Simple and compound epithelial tissue.
Name the different cell junctions found in tissues.
