Advertisements
Advertisements
Question
How does a gap junction facilitate intercellular communication?
Advertisements
Solution
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.
APPEARS IN
RELATED QUESTIONS
What is the following and where do you find them in animal body?
Ciliated epithelium
The following statement is wrong. Rewrite it correctly by changing either one or two words.
Simple squamous epithelium is present in respiratory tract.
The following statement is wrong. Rewrite it correctly by changing either one or two words.
Glandular epithelium is present in kidneys.
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.
Epithelial cells with cilia are found in ______ of our body.
The main function of the cuboidal epithelium is
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.
Nerve cell does not contain
The dead element present in the phloem is
If a potted plant is covered with a glass jar, water vapours appear on the wall of glass jar. Explain why?
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.
Sieve cells have no companion cells.
Write the salient features of the compound epithelium.
Explain simple epithelium and its types.
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.
