Question

Inner surface of the bronchi, bronchioles and fallopian tube are lined by
(A) Cubical epithelium
(B) Columnar epithelium
(C) Squamous epithelium
(D) Ciliated epithelium

Answer 1

Hint: Bronchi are a part of lungs and they are the airways which lead from the trachea into the lungs and then they branch further into small structures until they reach alveoli.

Complete answer:
Ciliated epithelium lines the trachea, bronchi of the lungs, parts of the nasal cavities, the uterus and oviduct of the female, and the vas deferens and epididymis of the male. A single projection from the exposed surface of a cell, usually large and long, is called a flagellum. Flagellated cells are common on the surface of many simple animals.

When the cells of an epithelial surface are several layers deep, various epithelial types can be distinguished: stratified, stratified ciliated, and transitional epithelium. In stratified epithelium, which is found in the epithelium of the skin and of many mucous membranes (e.g., mouth, esophagus, rectum, conjunctiva, vagina), the surface cells are flattened, those of the middle layer are polyhedral, and those of the lowest layer are cubical or columnar. This type of epithelium covers surfaces exposed to friction. The surface cells are constantly being rubbed off and are replaced by new cells growing up from below.

Therefore, from the above explanation the correct option is (D) Ciliated epithelium.

Note: Epithelium may be protective, absorptive, or secretory. It may produce special outgrowths (hairs, nails, horns on animals), and manufacture chemical material (e.g., keratin), in which case the whole cell becomes modified. In other instances, it contains fat droplets, granules of various kinds, protein, mucin, watery granules, or glycogen.