Characteristics Of Epithelial Tissues Practice Test

Keratinization builds a tough, dry protective surface by turning cells into keratin-filled, dead cells that have lost their nuclei as they move toward the surface. This creates the outermost layer (the stratum corneum) that resists abrasion and prevents water loss. This process is the hallmark of the epidermis of the skin, where mechanical protection is essential. That’s why the statement describing keratinization as producing a tough, dry surface with loss of nuclei in dead cells and identifying it as typical of the skin’s epidermis is the best fit. Mucous membranes of the respiratory tract rely on mucus production rather than keratinization, the intestine is geared for absorption and remains non-keratinized, and while some parts of the oral mucosa can be keratinized (like the hard palate and gingiva), the classic example is the skin.