NEET BIOLOGY

Detailed explanation-1: -Pseudostratified ciliated columnar epithelium secretes and moves mucus by ciliary action. An example of this type of epithelium is in the upper respiratory tract.

Detailed explanation-2: -The presence of pseudostratified columnar epithelium in the upper respiratory tract (composed of the nose, trachea and bronchi) protects the lungs from these irritants. Goblet cells of the epithelium secrete mucus to trap particles and prevent them from traveling further down respiratory passages.

Detailed explanation-3: -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-4: -Although most epithelial tissues are a type of tissue on the surface of bodily structures (e.g., the skin or the lining of the intestines), some are also part of glandular tissue that produce and secrete products, such as mucus and proteins.

Detailed explanation-5: -Found most heavily along the respiratory tract, pseudostratified ciliated columnar epithelial cells help trap and transport particles brought in through the nasal passages and lungs.