Question

Ciliated columnar epithelium occurs in
a. Bile duct and oesophagus
b. Eustachian tube and stomach lining
c. Fallopian tube and bronchioles
d. Fallopian tubes and urethra

Answer 1

Hint: Ciliated columnar epithelium consists of columnar cells. The Ciliated columnar epithelium contains cells that transmit various types of hair growth to a free surface known as cilia. These cilia promote movement and hold mucous membranes or particles in one direction.

Complete answer:
An epithelium is a tissue made up of one or more layers of cells that cover the outer and inner surfaces of various parts of the body. The term "epithelium” was given by the Dutch anatomist Ruysch.

Ciliated Epithelium: The cells have many sensitive hairs such as growths and cilia that arise from the underlying granules. The ciliary epithelium also contains the auditory cup-shaped secretory cells. The cilia carry the material in contact with the material, maintaining rhythmic movement and generating electrical current.
• Ciliary cubic epithelium: consists of cubic cells with cilia on the free surface. It occurs in certain parts of the kidney nephron.
• Ciliated columnar epithelium: It consists of columnar cells with cilia on the free surface. This epithelium surrounds most of the airways and fallopian tubes (fallopian tubes), and also connects the ventricles of the brain to the central ducts of the spinal cord. It is also present in the cavity of the middle ear membrane and ear canal (Eustachian tube).

Let’s study each option one by one
> Bile duct and oesophagus-
In bile duct and oesophagus squamous epithelium are present.

> Eustachian tube and stomach lining-
In Eustachian tube ciliated columnar epithelium are present but in the stomach lining columnar epithelium is present.

> Fallopian tube and bronchioles-
In bronchial tube and fallopian tubes ciliated columnar epithelium are present.

> Fallopian tubes and urethra-
In fallopian tubes ciliated columnar epithelium is present but in female urethra pseudo stratified epithelium is present.

Hence, the correct answer is option (C).

Additional information:
Epithelial tissue appears on the outer and inner surfaces of the exposed area of ​​the body and forms a protective layer.
Epithelial tissue consists of cells of various shapes, located close to each other in one or more layers. There are very few problems between cells. Cells are held together by the bonds between cells. Epithelial tissue is usually found in a thin, non-cellular basement membrane.

Note: The main function of cilia movement is to maintain a constant flow of mucus, liquid, suspended particles or objects in one direction. In the airways, the cilia help push mucus down the neck. In the fallopian tube, the cilia help propel the egg into the uterus. The cilia in the ventricles (cavities) of the brain and the central ducts of the spinal cord help maintain the circulation of cerebrospinal fluid. In the nephron of the kidneys, cilia support the movement of urine.