Exam One - 1.6 Integumentary System

Question 1

What are the layers of the skin from superficial to deep?

Answer 1

stratum corneum
epidermis
dermis
hypodermis

Question 2

stratum corneum characteristcs

Answer 2

dead cells
outermost layer

Question 3

epidermis

Answer 3

superficial layer of stratified epithelium

Question 4

dermis

Answer 4

vascular

Question 5

hypodermis

Answer 5

also called subcutaneous later or superficial fascia

Question 6

general characteristics of skin

Answer 6

• sweat glands
• sensory nerves (to pressure/pain)
• apocrine glands (in armpit/groin) creates musky scent/produces fluid
• blood vessels (artery/vein)
• hair follicles
• arrector pili muscles
• sebaceous (secrete oily fluid to make water loss barrier)
• sensory receptors

Question 7

characteristics of the epidermis

Answer 7

• its the surface later
• phospholipid layer
• kertinocytes (dead cells linked together)
• desmosomes (hold cell to cell togethers)
• hemidesmosomes (hold cell to connective tissue basal layer)
• epidermal cell
• melanocytes (create melanin)
• basal lamina (border to dermis)

Question 8

cells of the epidermis

Answer 8

keratinocytes
melanocytes
langerhans cell & merkel cells (immune cells that respond when theres a cut in the skin)

Question 9

Function of the Dermis

Answer 9

• support the epidermis
• sensation
• thermoregulation
• lubrication
• hair growth

Question 10

important characteristics between epidermis and dermis

Answer 10

• hemidesmosomes
• desmosomes
• basal lamina

Question 11

Function of the hypodermis

Answer 11

• insulation
• energy storage
• connects skin to muscle/bone (padding for organs)

Question 12

Other structures in skin

Answer 12

nails and hair

Question 13

General overall functions of the integumentary system

Answer 13

protection
prevents water loss
regulated body temperature
defends against pathogens
allows sensation
excretes substances
regulated Ca+ levels
produces vitamin D

Question 14

What is vitamin D important for?

Answer 14

increased Gut Ca+ absorption
increased bone calcification
increased bone reabsorption
decreased renal Ca+ and phosphate excretion