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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
Fill in the blank
Epithelial tissue is made of cells without any ...................... spaces.
Name one place in living organisms where the following tissues is located:
Squamous epithelium
Name one place in living organisms where the following tissue is located:
Ciliated epithelium
How many types of epithelial tissues have you studied? Write their functions.
Give structure, types and functions in brief of the following:
Epithelial tissue
State whether true or false. If false, correct the statement.
Epithelial tissue is protective tissue in animal body.
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.
Intestine absorb the digested food materials. What type of epithelial cells are responsible for that?
Fats are stored in human body as
Differentiate between sclerenchyma and parenchyma tissues. Draw well labelled diagram.
The ______ epithelium is also known as the pavement membrane.
______ epithelium is seen in sweat glands.
Write one point of difference between
Simple and compound epithelial tissue.
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.
Name the different cell junctions found in tissues.
Match List I with List II.
| List I | List II |
| A. Mast cells | I. Ciliated epithelium |
| B. Inner surface of bronchiole | II. Areolar connective tissue |
| C. Blood | III. Cuboidal epithelium |
| D. Tubular parts of nephron | IV. specialised connective tissue |
Choose the correct answer from the options give below:
