Question

Inner lining of urinary bladder is composed of
a. Columnar Epithelium
b. Squamous Epithelium
c. Transitional Epithelium
d. Pseudostratified Epithelium

Answer 1

Hint: In this question, this type of tissue which consists of multiple layers of epithelial cells that can contract and expand. This type of tissue structure is found in Urothelium, including the urinary bladder, the ureters and the superior urethra and gland ducts of the prostate. It is so named because of its function in the transition of the degree of distension.

Complete answer:
> Option A is incorrect.
Columnar epithelium is an epithelial tissue that is composed of columnar epithelial cells, with or without cilia, and it is involved primarily in secretory, absorptive or excretory functions. It is composed of column-shaped epithelial cells.

> Option B is incorrect.
Squamous epithelium cells are flat and usually found lining surfaces that require a smooth flow of fluid. It also lines areas that require a very thin surface for molecules to pass through, such as the air sacs in your lungs.

> Option C is correct.
The urinary bladder is lined with the transitional epithelial tissue which has the tendency to stretch to accommodate the large volume of urine. This tissue provides protection to the underlying tissues from the acidic and alkaline urine.

> Option D is incorrect.
It is an epithelium made up of cells that reach the basement membrane and appear to be stratified because their nuclei are at different levels.

Hence, the correct answer is option (C).

Note: This epithelium is found in the urinary bladders, ureters and urethra, as well as in the ducts of the prostate gland. It’s one of the features is that it stretches and recovers the original form.