chapter 10

Question 1

what’s another name for skin and the connective tissue beneath it?

Answer 1

integuement

Question 2

what’s the integumentary system?

Answer 2

used when considering the integument as a body system

Question 3

what does skin do?

Answer 3

covers the body and acts as a barrier between the internal and external environment

Question 4

what are the 2 primary layers of skin?

Answer 4

1. epidermis
2. dermis

Question 5

what’s the epidermis?

Answer 5

superficial thinner layer of skin

Question 6

what’s the dermis?

Answer 6

deep thicker layer

Question 7

what’s a dermoepidermal junction?

Answer 7

area where cells meet the connective tissue cells of the dermis

Question 8

what’s the hypodermis?

Answer 8

beneath the dermis and is rich in fat and loose fibrous tissue

Question 9

what is most of the body covered by?

Answer 9

thin skin

Question 10

what are examples of thick skin? 3

Answer 10

• hairless skin covering palms of hands and fingertips
• soles of feet
• other areas subject to friction

Question 11

what are friction ridges?

Answer 11

they form fingerprints and help us grip things

Question 12

what is keratin?

Answer 12

tough fibrous protein and they make up 90% of epidermal cells

Question 13

what are melanocytes?

Answer 13

contribute colored pigments to skin and decrease the amount of UV light that can penetrate deeper layers of the skin

Question 14

what is vitiligo?

Answer 14

loss of pigments in certain areas of the skin

Question 15

what are the five distinct layers of cells strata?

Answer 15

• stratum basale
• stratum spinosum
• stratum granulosum
• stratum lucidum
• stratum corneum

Question 16

what’s the stratum basale?

Answer 16

single layer of columnar cells that are responsible for the continual regeneration of the epidermis

Question 17

what’s the stratum spinosum?

Answer 17

above the basale layer and consists of several layers dividing keratinocytes

Question 18

what’s the stratum lucidum?

Answer 18

very flat closely packed and clear and provides additional strength to skin and helps with skin hydration

Question 19

what’s the stratum corneum?

Answer 19

most superficial layer and acts as the protective barrier of the skin

Question 20

what’s the stratum granulosum?

Answer 20

where the process of surface keratin formation begins and it helps the skin barrier become harder to penetrate by producing keratin

Question 21

what two layer is the dermis composed of?

Answer 21

thin papillary and thick reticulum

Question 22

what’s dermal papillae?

Answer 22

dermis bumps that help bind the skin layers together

Question 23

what does the reticular layer do?

Answer 23

provides structural support and elasticity to the skin