NEET PG DENTAL EXAM

Detailed explanation-1: -The mucous membrane lining the trachea consists of pseudostratified ciliated columnar epithelium with numerous goblet cells. The mucous produced by the goblet cells traps inhaled particles and the cilia move the mucous and particle to the larynx, from which they enter the pharynx and are swallowed or spit out.

Detailed explanation-2: -Goblet cells are modified epithelial cells that secrete mucus on the surface of mucous membranes of organs, particularly those of the lower digestive tract and airways.

Detailed explanation-3: -Pseudostratified ciliated epithelium lines the nasal cavities, trachea, and bronchi. It contains several types of cell. The basal cells (1), the nuclei of which form a basal row, are poor in internal structures. They serve to replace dead ciliated cells.

Detailed explanation-4: -The majority of the respiratory tree, from the nasal cavity to the bronchi, is lined by pseudostratified columnar ciliated epithelium. The bronchioles are lined by simple columnar to the cuboidal epithelium, and the alveoli possess a lining of thin squamous epithelium that allows for gas exchange.