STRUCTURAL ORGANISTION OF PLANTS AND ANIMALS
ANIMAL TISSUES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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the epithelial cells rapidly grow and are replaced
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epithelial cells are slow growing and rarely shed.
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Either A or B
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None of the above
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Detailed explanation-1: -Epithelium tissue are closely packed cells which make up the lining of external surface and the internal lining of organs. It has a basement membrane made of mucopolysaccharide and collagen.
Detailed explanation-2: -Epithelial tissue’s ability to heal itself so rapidly owes to its high mitotic rate. Epithelial tissue contains a large number of stem cells in the lower layers, which constantly divide in order to replace the cells above them. This allows epithelial tissue to replace damaged cells quickly and easily.
Detailed explanation-3: -The homeostatic replacement of cells varies substantially among different epithelia. The epithelium of the intestine completely self-renews within ∼5 days. By contrast, interfollicular epidermis takes ∼4 weeks to renew, whereas the lung epithelium can take as long as 6 months to be replaced.
Detailed explanation-4: -Epithelial cells reproduce rapidly. In fact, they are one of the fastest reproducing cells found in the body.