One of the following statements about the stratum corneum is correct. Which one?

Correct Answer: B

Rationale: The stratum corneum consists of dead, keratinized cells, forming a protective barrier shed through abrasion correct. Cell division occurs in the stratum basale, not corneum. Collagen, elastin, and reticular fibers are dermal, not in the avascular corneum. Sensory receptors reside in the dermis or deeper epidermis, not the dead corneum. Its dead cell composition is its defining trait, making this the accurate statement.

Correct Answer: B

Rationale: Pacinian corpuscles, deep pressure and vibration sensors, are located in the dermis, often near its border with the hypodermis, within the reticular layer. The epidermis, avascular and superficial, lacks such receptors. The hypodermis (subcutaneous tissue) may contain some, but they're primarily dermal, integrated with nerve networks there. The dermis's role as the sensory and structural layer, housing various receptors, makes it the correct location for these lamellated corpuscles.

Correct Answer: A

Rationale: The subcutaneous tissue (hypodermis) attaches the skin to underlying muscles and bones via loose connective tissue and fat, allowing mobility while securing position. UV protection is the epidermis's role via melanin. Sweat production occurs in the dermis, not hypodermis. Hair follicle nourishment is dermal, via blood and sebum. The hypodermis's anchoring function, cushioning and connecting, makes attachment its primary purpose, per anatomical structure.

Correct Answer: B

Rationale: Meissner's corpuscles, in the upper dermis, detect light touch and low-frequency pressure, enabling fine tactile sensation like texture. Pain is nociceptors' domain, temperature changes are thermoreceptors', and sweat production is glandular, not receptor-related. Their location and sensitivity to gentle contact distinguish them in the skin's sensory system, making this their primary role.

Correct Answer: A

Rationale: Pacinian corpuscles, deep in the dermis, detect pressure and vibration, responding to mechanical stimuli with their lamellated structure, aiding in sensing heavy touch. Light touch and texture are Meissner's role, temperature changes are thermoreceptors', and sweat production is glandular. Their deep placement and vibration sensitivity distinguish them, making this their primary role.