chapter 6

Question 1

composition of the integumentary system

Answer 1

skin, hair, nails, associated exocrine glands

Question 2

integumentary aids in what

Answer 2

sensory function, thermoregulation, vitamin d synthesis

Question 3

fascia

Answer 3

connects skin to underlying muscle

Question 4

most superficial layer of the skin

Answer 4

epidermis

Question 5

made of keratinized stratified squamous epithelium

Answer 5

epidermis

Question 6

found on palms of hands and soles of feet

Answer 6

thick skin (five layers)

Question 7

found in all other locations of the skin but palms and soles

Answer 7

thin skin (4 layers)

Question 8

mature cells

Answer 8

keratinocytes

Question 9

keratin makes cells what

Answer 9

tough and water-resistant

Question 10

give hair, nails, and skin hardness and water-resistance and is produced by keratinocytes

Answer 10

keratin

Question 11

layers of epidermis (superficial to deep)

Answer 11

stratum corneum, stratum granulosum, stratum spinosum, stratum basale

Question 12

layer that is only found in thick skin

Answer 12

stratum lucidum

Question 13

deepest, actively divide to replace cells in superficial layers

Answer 13

stratum basale

Question 14

sensory receptors used for discriminatory touch

Answer 14

merkel cells

Question 15

produce melanin to protect cells from uv radiation

Answer 15

melanocytes

Question 16

activity of this part leads to different skin tones

Answer 16

melanocytes

Question 17

two forms of melanin

Answer 17

eumelanin and pheomelanin

Question 18

black and brown pigment

Answer 18

eumelanin

Question 19

reddish pigment

Answer 19

pheomelanin

Question 20

eight to ten cell layers where cells are continually pushed upwards

Answer 20

stratum spinosum

Question 21

layer wherein keratinocytes are shaped like footballs

Answer 21

stratum spinosum

Question 22

cells that provide immune protection

Answer 22

langerhans (dendric)

Question 23

layer where cells begin to flatten and accumulate more keratin

Answer 23

stratum granulosum

Question 24

melanin can travel to cells within this layer contained in melanosomes

Answer 24

stratum granulosum

Question 25

cells begin to die at the most superficial layers of this layer

Answer 25

stratum granulosum

Question 26

melanin produced by melanocytes in stratum basale

Answer 26

melanosomes

Question 27

melanin stored in granules

Answer 27

melanosomes

Question 28

long extensions transfer melanin to cells in stratum granulosum

Answer 28

melanosomes

Question 29

composed of tightly packed, dead keratinocytes

Answer 29

stratum lucidum

Question 30

cell component that is a protein that functions as a water barrier

Answer 30

eleidin

Question 31

superficial layer of the epidermis

Answer 31

stratum corneum

Question 32

fifteen to twenty layers of dead keratinocytes

Answer 32

stratum corneum

Question 33

what happens to cells in the stratum corneum

Answer 33

shed and lost due to mechanical forces

Question 34

has four layers of epidermis

Answer 34

thin skin

Question 35

has five layers of epidermis

Answer 35

thick skin

Question 36

has higher number of sensory receptors

Answer 36

thick skin

Question 37

fingerlike projections of the dermis to the epidermis

Answer 37

papillae

Question 38

prevents the two layers from separating

Answer 38

papillae

Question 39

noticeable as fingerprints

Answer 39

papillae