Which of the following statements is/are false about columnar epitheli...
In columnar epithelium, nuclei are located at base.
View all questions of this test
Which of the following statements is/are false about columnar epitheli...
B) (v) only
Columnar epithelium is a type of epithelial tissue that is characterized by tall and slender cells. It is found in various parts of the body, including the stomach and intestines, where it plays a role in secretion and absorption. However, there are certain characteristics of columnar epithelium that do not align with statement (v).
(i) It is made of tall and slender cells: True. Columnar epithelium is composed of cells that are taller than they are wide, giving them a column-like appearance. This allows for greater surface area for secretion and absorption.
(ii) The free surface may have microvilli: True. Microvilli are tiny protrusions on the surface of the cells that further increase the surface area and aid in absorption. They are commonly found in columnar epithelium, especially in regions involved in absorption, such as the intestines.
(iii) They are found in the stomach and intestine and help in secretion and absorption: True. Columnar epithelium is indeed found in the stomach and intestines, among other locations. The cells of columnar epithelium are specialized for various functions, including secretion and absorption.
(iv) Ciliated epithelium is mainly present in hollow structures like bronchioles and Fallopian tubes: True. Ciliated epithelium is a different type of epithelial tissue that is characterized by the presence of cilia on its surface. These hair-like structures help to move substances along the surface of the tissue. Ciliated epithelium is predominantly found in hollow structures such as the bronchioles in the lungs and the Fallopian tubes in the female reproductive system.
(v) They have apical nuclei: False. In columnar epithelium, the nuclei are typically located towards the base of the cells, closer to the basement membrane. This arrangement allows for more cytoplasm and organelles, such as the Golgi apparatus, to be present near the apical surface where secretion and absorption occur.
Therefore, statement (v) is false because columnar epithelium does not have apical nuclei.
To make sure you are not studying endlessly, EduRev has designed NEET study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in NEET.