Chapter 5.3 Integumentary System_Hair, Nails, Skin Pathologies, Wound Healing

Question 1

What is hair made of?

Answer 1

dead compressed keratinocytes

Question 2

Where is the hair matrix and what happens there?

Answer 2

bottom of the hair where cells divide and move their way up through the shaft of the hair

Question 3

What is contained in the hair matrix?

Answer 3

melanocytes
papilla
blood vessels

Question 4

What is the papilla of the hair?

Answer 4

the blood supply for the hair

Question 5

What do the melanocytes in the hair do?

Answer 5

give it its color

Question 6

What are nails made of?

Answer 6

tightly compressed dead keratinocytes

Question 7

What is the fastest growing disease of the skin in the US?

Answer 7

skin cancer

Question 8

Name three types of skin cancer

Answer 8

basal cell carcinoma
squamous cell carcinoma
melanoma

Question 9

In what layer of the epidermis does basal cell carcinoma develop?

Answer 9

in the stratum basale

Question 10

Does basal cell invade the epidermis or the dermis?

Answer 10

dermis

Question 11

Does basal cell metastasize?

Answer 11

rarely

Question 12

What does basal cell look like?

Answer 12

small, shiny bump with a depressed center and pearly edges later on

Question 13

Where does squamous cell carcinoma develop?

Answer 13

the stratum spinosum

Question 14

Does squamous cell metastisize?

Answer 14

yes

Question 15

What does squamous cell look like?

Answer 15

red, scaly, raised

Question 16

How does malignant melanoma form?

Answer 16

UV rays absorbed by melanocytes that are reproducing uncontrollably, usually from a pre-existing mole

Question 17

Does melanoma metasticize?

Answer 17

yes

Question 18

What do A B C D stand for for early skin cancer detection?

Answer 18

Asymmetry
Border irregularity
Color change
Diameter

Question 19

What does asymmetry mean?

Answer 19

The edges of the mole do not match

Question 20

What do you look for in the border of a mole for cancer detection?

Answer 20

ragged or irregular

Question 21

What do you look for in the color of a mole when detecting cancer?

Answer 21

the color of the mole varies

Question 22

What do you look for in diameter when screening for cancer?

Answer 22

Anything bigger than a pencil eraser

Question 23

How are burns rated?

Answer 23

how deeply they penetrate

Question 24

What layer of the skin is affected by a first-degree burn?

Answer 24

the epidermis

Question 25

Does a first-degree burn heal on its own?

Answer 25

Yes

Question 26

What layer of the skin is affected by second-degree burns?

Answer 26

the dermis

Question 27

Is the entire epidermis damaged with second-degree burns?

Answer 27

yes

Question 28

What forms from second-degree burns?

Answer 28

blister

Question 29

what layers of the skin does a third-degree destroy?

Answer 29

epidermis dermis hypodermis

Question 30

can second degree burns repair on their own?

Answer 30

yes

Question 31

can third-degree burns repair on their own?

Answer 31

no

Question 32

How does the skin heal after third-degree burns?

Answer 32

the tissue may die and have to be amputated or removed or it will reform with scar tissue that is collagen, connective tissue, non functional with no nerve endings or blood supply

Question 33

When does scar tissue form?

Answer 33

When the epithelial cells cannot heal on their own and tissue comes up from the dermis to the surface

Question 34

does scar tissue have hair, nerve endings, blood vessels?

Answer 34

no