Integumentary Systen

Question 1

What are the functions of the Integumentary System?

Answer 1

Protect the body from the outside world, retain body fluids, protect against disease, eliminate waste products, regulate body temperature,

Question 2

What type of tissue make up the epidermis, dermis and subcutaneous layers?

Answer 2

Epithelial tissue

Question 3

What are the layers of the epidermis?

Answer 3

Stratum Basale- deepest layer of epidermis
Stratum Spinosum- secretes lipids that help water-proof the skin
Stratum granulosum- continued production of keratin and water-proofing lipids
Stratum Lucidum- palms of hands and soles of feet
Stratum Corneum- outer most layer of epidermis

Question 4

What is keratin? How is it formed? What is its function?

Answer 4

protein that makes up hair, skin and nails
forms structural blocks of hair, skin and nails
protects cells from damage and stress, helps heal wounds

Question 5

What is melanin? Which cell produces it? What are the 2 main types of melanin? What is its basic function?

Answer 5

pigment that gives color
melanocytes
eumelanin, pheomelanin, neuromelanin
pigmentation and UV protection

Question 6

List some of the accessory structures found within the dermis

Answer 6

Nerve fibers, sensory fibers, hair follicles, sebaceous glands and sweat glands

Question 7

What are the major determinants of skin color?

Answer 7

Melanin, carotene, hemoglobin

Question 8

What are dermal papillae?

Answer 8

finger like projections in the dermis that extend into the epidermis

Question 9

Describe the 3 most common types of skin cancer

Answer 9

Basal Cell Carcinoma - least malignant, most common, from stratum basale
Squamous cell carcinoma - sun-induced, from stratum spinosum
Malignant melanoma - most deadly, ABCDE rule

Question 10

What are the types of skin/cutaneous glands?

Answer 10

Sebaceous glands and sudoriferous glands