NEET BIOLOGY

Detailed explanation-1: -Because of its importance in acting as an osmotic barrier between the contents of the urinary tract and the surrounding organs and tissues, transitional epithelium is relatively impermeable to water and salts. This impermeability is due to a highly keratinized cellular membrane synthesized in the Golgi apparatus.

Detailed explanation-2: -Glands are an organised collection of secretory epithelial cells. Most glands are formed during development by proliferation of epithelial cells so that they project into the underlying connective tissue.

Detailed explanation-3: -Glandular epithelium is the main component of the secretory portion of glands, the portion which produces and secretes the secretory product. A gland can either be a single secretory cell, such as the goblet cells found in the digestive and respiratory tracts, or a group of secretory cells that form a bigger gland.

Detailed explanation-4: -Secretory epithelial cells are often found along the stomach and cervical canal. Extraepithelial glands are often found within organs, like the pancreas, and glands, like the mouth’s salivary glands and the skin’s sweat glands.