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A&P Chapter 5 Pearson Practice Test Questions and Answers | Latest Version | 2025/2026 | Correct & Verified
What is the epidermis?✔✔ The outermost layer of the skin made of stratified squamous epithelial tissue.
What cell type produces the pigment melanin?✔✔ Melanocytes synthesize melanin in the epidermis.
What is the primary function of keratinocytes?✔✔ To create keratin, a protein that strengthens and waterproofs the skin.
What layer of the skin contains blood vessels and nerves?✔✔ The dermis, located beneath the epidermis.
What forms the boundary between the epidermis and dermis?✔✔ The basement membrane zone, including the basal lamina and reticular lamina.
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What is the role of Langerhans cells in the skin?✔✔ They act as immune cells by capturing and presenting antigens.
What is the stratum basale?✔✔ The deepest epidermal layer where cells continually divide.
What is the function of the stratum corneum?✔✔ It provides a tough, protective layer of dead, keratin-filled cells.
Where are Merkel cells found and what is their function?✔✔ In the stratum basale, they function as sensory receptors for touch.
What is the papillary layer of the dermis?✔✔ The upper dermal region composed of loose connective tissue and dermal papillae.
What structure increases surface area to support the epidermis and dermis connection?✔✔ Dermal papillae, which interlock with the epidermal ridges.
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What type of tissue makes up the reticular layer of the dermis?✔✔ Dense irregular connective tissue with collagen and elastic fibers.
What is the role of collagen fibers in the dermis?✔✔ To provide strength and limit skin elasticity.
What do elastic fibers in the dermis allow?✔✔ They enable the skin to stretch and recoil.
What structures produce sweat?✔✔ Eccrine and apocrine sweat glands in the dermis.
How do eccrine sweat glands cool the body?✔✔ Sweat produced on the skin surface evaporates to release heat.
What distinguishes apocrine sweat glands?✔✔ They open into hair follicles and are activated during stress or arousal.
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