Integument

Question 1

sebaceous gland

Answer 1

secretes waxy oil around hair to protect against brittling
inhibit bacterium
-connected to hair follicle

Question 2

ceruminous glands

Answer 2

ducts empty onto external ear canal

• secretes cerumen (wax) and sebaceous
• protects against bacteria

Question 3

melanin

Answer 3

shades the nucleus to protect from UV radiation

Question 4

carotene

Answer 4

yellow-orange pigment

Question 5

albinism

Answer 5

inability to synthesize tyrosinase

Question 6

arector pili muscle

Answer 6

attached to the hair root and causes hair to stand on end

Question 7

hair contains

Answer 7

shaft (projects out of the skin) and root (part underneath the skin)

Question 8

bulb

Answer 8

part where hair connects to the CT layer

Question 9

papilla of the hair

Answer 9

nipple like area where blood vessels go into the bulb of the hair

Question 10

hair contains four main layers, they are

Answer 10

medulla
cortex
cuticle
follicle layer (internal and external root sheath

Question 11

hair matrix

Answer 11

where mitosis of hair cells is taking place and the coloring of the hair

Question 12

three stages of hair growth

Answer 12

1. growth stage
2. regression
3. rest stage

Question 13

lanugo

Answer 13

peach fuzz that is present on newborns

Question 14

eponychium

Answer 14

cuticle

Question 15

hyponychium

Answer 15

underside of nail

Question 16

nail matrix

Answer 16

part underneath the nail proximal to the eponychium, in which mitosis is taking place

Question 17

purpose of vitamin D

Answer 17

1. gut to absorb calcium from foods
2. kidney to regulate how much calcium to secrete or maintain
3. calcium complex in bone

Question 18

final product of vitamin D

Answer 18

1,25 dihydroxyvitamin D3

Question 19

inflammation stage of wound healing

Answer 19

• blood clot forms
• clean up debris, microbes, dead tissue
• increased vasodilation and capillary permeability
• inundated with neutrophils anad macrophages

Question 20

intermediate substance of vitamin D that is synthesized by the liver and kidney

Answer 20

calcitriol

Question 21

what are the four stages of wound healing?

Answer 21

1. inflammation
2. migratory
3. proliferative
4. maturation

Question 22

what is the process of the inflammatory response in wound healing?

Answer 22

fibrin forms a clot
vasodilation and capillary permeability
neutrophils clean up debris and foreign bodies

Question 23

what is the migratory phase of wound healing?

Answer 23

basal cells move into form basal layer
fibroblasts begin to lay down collagen and glycoproteins
angiogenesis and vessel repair

Question 24

granulation tissue

Answer 24

healing wounded tissue

Question 25

what happens in the proliferative phase of wound healing?

Answer 25

growth of epithelial cells below scab

random pattern of collagen growth

Question 26

what happens in maturation phase of wound healing?

Answer 26

collagen fibers become organized
fibroblasts decrease in number
blood vessels are normal, but fewer