Exam 1 Part 6

Question 1

Integument

Answer 1

cutaneous membrane

largest organ in body

Question 2

Integumentary system

Answer 2

skin and derivities

hair, glands, nails, sensory endings

Question 3

derma

Answer 3

skin

Question 4

functions of integumentary system

Answer 4

protection
hydroregulation
temperature regulation
Vitamin D synthesis
immune response
sensory reception
Excretion (oils, sweat)

Question 5

integument tissue layers

Answer 5

Epidermis
Dermis
Subcutaneous (not part of the system)

Question 6

Epidermis

Answer 6

ET. outer, subdivided into 4-5 structural layers
keratinized, stratifed squamous ET
most cells are dead (or dying)
airs and glands arise from epidermis that extends into dermis

Question 7

Dermis

Answer 7

deeper, subdivided into 2 layers. CT

Question 8

Subcutaneous

Answer 8

hypodermis. mostly fat and loose areolar CT

binds to muscle

Question 9

Epidermal layers

Answer 9

Stratum basale
Stratum spinosum
Stratum granulosum
Stratum lucidum
Stratum corneum

Question 10

Stratum basale

Answer 10

deepest epidermis layer
stem cells
single layer cuboidal cells on basement membrane

Question 11

3 main types of stratum basale

Answer 11

keratinocytes
Melinocytes
tactile cells

Question 12

Keratinocytes

Answer 12

toughened, waterproof skin
-constantly divide; migrate toward surface
cells die as keratin accumulates

Question 13

Melinocytes

Answer 13

produce pigment melanin

protects against UVR -barrier over nucleus)

Question 14

tactile cells

Answer 14

Merkel cells. touch

Question 15

stratum spinosum

Answer 15

some cell division

immune response cells

Question 16

stratum granulosum

Answer 16

keratinization begins here, immune reponse cells

often appears dakr

Question 17

stratum lucidum

Answer 17

in thick skin only

Question 18

Stratum corneum

Answer 18

outer most epidermal layer
cells all cornified (drid and flattened keratinized cells) are dead
especially thick on palms of hands and soles of feet
forms calluses and nails

Question 19

dermis

Answer 19

irregular CT. mainly collagen and some areolar CT
cuts parallel to collagen fibers heal more quickly
deeper, thicker than epidermis
Dermal papillae

Question 20

Dermal papillae

Answer 20

interface with epidermal ridges to create finger and toes prints (friction ridges)

Question 21

Dermis also contains:

Answer 21

blood vessels
nerves
glands (epidermal deriviatives)
hair follicles
arrector pili muscles

Question 22

sweat glands

Answer 22

sudoriferous glands

Question 23

Tattoos are in

Answer 23

the dermis

Question 24

1st degree burn

Answer 24

in epidermis

Question 25

2nd degree burn

Answer 25

in dermis

Question 26

3rd degree burn

Answer 26

in hypodermis. Bad because dehydration concern