integumentary system

Question 1

what are the functions of the skin

Answer 1

-protection/immunity
-temp regulation
-sensation
-assist in vit D synthesis

Question 2

define stratum corneum

Answer 2

-most superficial: primary barrier
- soft keratin, dead squamous, constantly shedding
-indicates hydration

Question 3

define stratum lucidum

Answer 3

-thin, clear layer of dead skin cells
-palms and soles

Question 4

define stratum granulosum

Answer 4

layer that contains the transition zone for the development of kertain

Question 5

define stratum spinosum

Answer 5

layer contains spiky or spiny projections

Question 6

define stratum basale

Answer 6

-deepest layer
-regenerates epidermis
-contains merkel cells, langerhans cells, melanocytes, keratinocytes

Question 7

define basement membrane

Answer 7

layer that separates epidermis and dermis

Question 8

define dermis

Answer 8

thickest layer
primary functions include: thermoregulation, storage of water/hydration, providing nhutrients and waste removal

Question 9

define the dermis papillary region

Answer 9

-bumpy surface that interdigitates with epidermis, strengthening connection
-influences contours of the skin surface

Question 10

define the dermis reticular region

Answer 10

-contains collage, elastic, reitcular fibers proviidng strength, extensibility, elasticity
-contrains roots of hair, sebaceous glands, sweat glands, receptors, blood vessels

Question 11

define hypodermis

Answer 11

-subcutaenous tissue
-attaches skin to underlying bone and muscle
-contains loose connective tissue, adipose, elastin
-50% body fat
-insulin and shock absoroptino
-pacinin cells- cold and pressure