module 6 structure and function of skin

Question 1

functions of skin (8)

Answer 1

protection
mechanical barrier: prevent fluid loss
sensory perception
temperature regulation
wound repair: cell replacement 
absorption and excretion
expression of emotions: blushing, facial exp. 
synthesizes vitamin D

Question 2

outer most layer

Answer 2

epidermis

Question 3

between epidermis and dermis

Answer 3

basement membrane

Question 4

stratum corneum

Answer 4

one layer of the epidermis
for protection
composed of dead squamous cells and contains keratin
- cellular stratum synthesizes keratin

Question 5

dermis

Answer 5

vascular CT
separates epidermis and subcutaneous tissue
Composed of: elastin, collagen, reticulin fibers, sensory nerves, autonomic motor nerves

Question 6

hypodermis/subcutaneous tissue

Answer 6

fatty cells
generate heat/insulation
calorie reserve

Question 7

eccrine sweat glands

Answer 7

release onto surface of skin

regulate temperature with water secretion

Question 8

apocrine sweat glands

Answer 8

deeper, respond to emotional stimuli

-> secretes odorless white fluid containing protein and carbs

Question 9

sebaceous sweat glands

Answer 9

secrete sebum and lipid rich fluid
keeps skin and hair from drying out
stimulated by sex hormones-testosterone

Question 10

apocrine gland locations

Answer 10

ear canal
axillae:
nipples
ano-genital region

Question 11

Eccrine gland locations

Answer 11

forehead
axillae
palms
soles

Question 12

puberty skin changes

Answer 12

epocrine glands enlarge
-> sweating and BO
sebaceous glands inc. sebum
-> oily skin and acne

Question 13

skin changes during pregnancy

Answer 13

inc. blood flow to skin: especially hands and feet
-> peripheral vasodilation and inc. capillaries
Inc. sebaceous gland activity and sweat
Skin darkening
- face, areola, axilla, vulva, perianal, umbilicus

Question 14

skin changes and aging

Answer 14

epidermis flattens
dermis decreases vascularity 
-> prominent joints 
sebaceous glands dec. activity 
-> dry skin