Epidermis and Integumentary System Concepts

What is a primary function of the integumentary system?

• Regulating blood sugar

• Producing digestive enzymes

• Synthesizing Vitamin D

• Filtering waste from blood

Which of the following components are part of the integumentary system?

• Bones, muscles, and tendons

• Heart, lungs, and blood vessels

• Skin, hair, and nails

• Brain, spinal cord, and nerves

How often is the entire epidermis typically replaced?

• Every 24 hours

• Every 4 to 6 weeks

• Every 6 months

• Once a year

Which type of epidermal cell is responsible for synthesizing melanin, the pigment that gives skin its color?

• Keratinocytes

• Langerhans cells

• Merkel cells

• Melanocytes

How many epidermal layers are found in "thick skin" compared to "thin skin"?

• Thick skin has 4 layers, thin skin has 5

• Thick skin has 5 layers, thin skin has 4

• Both thick and thin skin have 3 layers

• Thick skin has 6 layers, thin skin has 5

Which layer of the epidermis is exclusively found in the thick skin of the palms and foot soles?

• Stratum corneum

• Stratum lucidum

• Stratum granulosum

• Stratum spinosum

Why do epidermal cells eventually die as they move towards the surface of the skin?

• They are exposed to harsh environmental conditions

• They become compressed and flattened

• They move further from the blood supply

• Their keratin production ceases

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What is the primary function of the stratum basale layer of the epidermis?

• Providing a waterproof barrier

• Producing keratin for strength

• Initiating new cell production

• Protecting against UV radiation

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Which of the following components are primarily found within the dermis layer of the skin?

• Dead keratinocytes and melanin

• Adipose tissue and elastic fibers

• Blood vessels and nerve fibers

• Stratum corneum and stratum lucidum

What are the main functions of the hypodermis?

• Protection from UV radiation and pathogen defense

• Insulation, energy storage, and shock absorption

• Regulation of skin pigmentation and texture

• Production of sweat and oil