The Cells belonging to the following type of epithelium are provided with extra reserve of cell membrane:

The Cells belonging to the following type of epithelium are provided with extra reserve of cell membrane:

A. Transitional
B. Stratified Squamous
C. Stratified Cuboidal
D. Stratified Columnar

Answer is A. Transitional

An extra reserve of cell membrane is required at sites that are subjected to stress and tension changes. A typical example of such a site is the wall of the urinary bladder which is covered with transitional epithelium.

Transitional Epithelium is a stratified tissue and has the property to cope with stretching and tension. Being stratified, it consists of several layers of cells of varying shape in the absence of stretching or tension. As tension increases, the epithelial sheet is expanded and the number of observable cell layers (the reserve) will decrease and cell shape will change from cuboid to squamous.

The ability of the transitional epithelium to stretch protects the distensible structures that it lines from tearing when stretched with great force.