Advertisements
Advertisements
Question
Some epithelia are pseudostratified. What does this mean?
Advertisements
Solution
Pseudostratified epithelial cells are columnar but unequal in size. Although the epithelium is single-layered yet it appears to be multilayered due to the fact that nuclei lie at different levels in different cells.
RELATED QUESTIONS
Describe various types of epithelial tissues with the help of labelled diagrams
Based on the following information, identify the three types of epithelial tissue in the figures given below :
| a |  |
b |  |
c |  |
(1) Cuboidal epithelium: It consists of a single layer of cuboidal cells.
(2) Columnar epithelium: It is composed of tall, cylindrical cells with oval nuclei usually placed at the base of the cells.
(3) Ciliated epithelium: It consists of cells being hair-like cilia on their free surface.
The following statement is wrong. Rewrite it correctly by changing either one or two words.
Simple squamous epithelium is present in respiratory tract.
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
Epithelial cells with cilia are found in ______ of our body.
The ciliated epithelium lines the______.
If a potted plant is covered with a glass jar, water vapours appear on the wall of glass jar. Explain why?
Write true (T) or false (F)
Epithelial layer is permeable layer.
Write true (T) or false (F)
Epithelial layer does not allow regulation of materials between body and external environment.
Give reasons for
Intercellular spaces are absent in sclerenchymatous tissues.
The ______ epithelium is also known as the pavement membrane.
An epithelial layer does not allow the regulation of materials between the body and the external environment.
Sieve cells have no companion cells.
Assertion: Materials are exchanged between epithelial and connective tissues by diffusion.
Reason: Blood vessels are absent in epithelial tissue.
Write one point of difference between
Simple and compound epithelial tissue.
Explain simple epithelium and its types.
Write the appropriate type of tissues in column B according to the functions mentioned in column A.
| Column A | Column B |
| a. Secretion and absorption | i. ______ |
| b. Protective covering | ii. ______ |
| c. Linking and supporting framework | iii. ______ |
