Integumentary System Functions and Structures

Mr. Andersen explains the integumentary system, covering its components: skin, hair, and nails. He discusses their protective roles, sensory functions, thermoregulation, and vitamin D synthesis. The epidermis is detailed with its layers: stratum basale, spinosum, granulosum, lucidum, and corneum. The dermis and hypodermis are explored, highlighting their vascular and sensory roles. Accessory structures like hair and nails are described, focusing on their formation and functions.

Which of the following is NOT a function of the integumentary system?

• Thermoregulation

• Production of red blood cells

• Sensation of touch and pain

• Protection against bacteria

What is the top layer of the skin called?

• Hypodermis

• Dermis

• Epidermis

• Subcutaneous layer

Which layer of the epidermis is responsible for mitosis?

• Stratum spinosum

• Stratum corneum

• Stratum basale

• Stratum lucidum

What gives skin its color and protects against UV radiation?

• Collagen

• Elastin

• Keratin

• Melanin

Why do people with ancestors from near the equator have more melanin?

• To enhance tactile sensation

• To prevent folic acid degradation

• To protect against cold temperatures

• To synthesize more vitamin D

Which layer of the skin contains vascular tissue and glands?

• Stratum corneum

• Hypodermis

• Dermis

• Epidermis

What is the primary function of sebaceous glands?

• Detect pain

• Synthesize vitamin D

• Secrete oil

• Produce sweat

What type of tissue is abundant in the hypodermis?

• Nervous tissue

• Connective tissue

• Muscle tissue

• Epithelial tissue

What protein is abundant in hair and nails, making them durable?

• Collagen

• Keratin

• Elastin

• Melanin

What is the function of the matrix in hair and nail formation?

• To produce oil

• To sense touch

• To create new cells

• To regulate temperature