Integumentary System

What are the functions of the integumentary system?

• Protection, sensation, thermoregulation, and synthesis of vitamin D

• Digestion, respiration, circulation, and excretion

• Muscle contraction, nerve transmission, hormone production, and immune response

• Reproduction, growth, development, and metabolism

What is the top layer of the skin called?

• Epidermis

• Dermis

• Hypodermis

• Stratum corneum

Which layer of the epidermis is responsible for melanin production?

• Stratum basale

• Stratum spinosum

• Stratum granulosum

• Stratum lucidum

What is the function of melanin in the skin?

• Determines skin color and protects against UV radiation

• Allows for tactile sensations and pain perception

• Regulates body temperature and carries heat away

• Synthesizes vitamin D and transports calcium to the bones

Where is the stratum lucidum found?

• Only in thick skin, such as palms and soles of feet

• Only in thin skin, such as arms and legs

• Throughout the entire epidermis

• In the hypodermis layer

What is the role of the hypodermis?

• Provides insulation, stores fat, and anchors the skin to underlying tissues

• Produces sweat and sebum to keep the skin moisturized

• Contains blood vessels and nerve receptors for sensation

• Creates new skin cells through mitosis

What is the purpose of sweat glands in the integumentary system?

• To regulate body temperature through evaporation

• To produce melanin for skin pigmentation

• To protect against bacterial infections

• To synthesize vitamin D

What is the function of sebaceous glands?

• To secrete oil and keep the hair and skin waterproof

• To produce sweat and cool the body

• To create new skin cells through mitosis

• To protect against UV radiation

What are hair and nails made of?

• Keratin

• Melanin

• Collagen

• Elastin

Where are nails primarily formed?

• In the matrix at the base of the nail

• In the dermis layer of the skin

• In the hypodermis layer of the skin

• In the stratum corneum of the epidermis