Chapter 5

Question 1

skin

Answer 1

larget organ, 16% of body weight

Question 2

two major components

Answer 2

cutaneous membrane and accessory structure

Question 3

epidermis

Answer 3

surface layer of the skin, stratified, outer layer

Question 4

keratinocyte

Answer 4

primary cell—produce keratin (waterproof), most abundant

Question 5

epidermal ridges

Answer 5

responsible for finger prints

Question 6

finger prints

Answer 6

determined by genes, made up from epidermal ridges

Question 7

thin skin

Answer 7

most of the skin in body, 4 layers

Question 8

thick skin

Answer 8

palms and soles, 5 layers

Question 9

epidermal layers

Answer 9

stratum basale 
stratum spinosum
 stratum granulosum
stratum lucidum 
stratum corneum

Question 10

stratum basale :

Answer 10

basal layer (bottom)

Question 11

stratum spinosum

Answer 11

spiny layer

Question 12

Stratum granulosum

Answer 12

grainy layer

Question 13

Stratum lucidum:

Answer 13

only found in thick skin, clear layer, variable

Question 14

Stratum corneum:

Answer 14

top layer, mostly dead cells

Question 15

dermis

Answer 15

middle layer

Question 16

Accessory structures:

Answer 16

Everything else but the actual epithelium

– hair follicles, sebaceous glands, sweat glands

Question 17

Subcutaneous layer (Hypodermis)

Answer 17

bottom layer

Question 18

functions of integumentary system

Answer 18

o	Protection
o	Excretion
o	Body temp 
o	Production of melanin and keratin
o	Vitamin D3
o	Lipid storage
o	Sensory input

Question 19

carotene

Answer 19

orange yellow pigment

Question 20

melanin

Answer 20

• -Brown, yellow-brown, or black
• -Produced by melanocytes
• -Protects you from ultra violet light (UV)

Question 21

albinism

Answer 21

deficiency or absence of melanin production

Question 22

skin cancer

Answer 22

tumors that arise from exposed skin

Question 23

tumor

Answer 23

group of unusual cells

Question 24

basal cell carcinoma

Answer 24

most common, skin cancer from basal cells

Question 25

malignant melanoma

Answer 25

#1 form of serious cancer

Question 26

metastasis

Answer 26

spreading from one place to another

Question 27

lines of cleavage

Answer 27

lines where the skin pattern is detected

Question 28

1st degree burns

Answer 28

epidermis is affected, ex; sunburn

Question 29

2nd degree burns

Answer 29

- -through epidermis some of dermis - -blistering pain and swelling - - healing takes 1-2 weeks, scar potential

Question 30

3rd degree burns

Answer 30

- -epidermis, dermis, and subcutaneous layer | - - skin grafting

Question 31

terminal hairs

Answer 31

thicker, on head, under arms, genitalia

Question 32

villus

Answer 32

smaller, shorter, delicate, found on body surfaces

Question 33

arrector pili

Answer 33

muscle attached to hair

Question 34

sebaceous glands

Answer 34

- -Oil glands | - -Found everywhere except palms and soles

Question 35

sebum

Answer 35

products of oil glands—lubricates hair and skin

Question 36

sweat glands

Answer 36

Found everywhere, mostly in palms and soles

Question 37

Vitamin D production

Answer 37

- -Produced in the skin by exposure to UV light | - -diet

Question 38

Rickets

Answer 38

disease caused by lack of vitamin D

Question 39

Keloids:

Answer 39

Scars that form very thick