Ch. 6

Question 1

composed mostly of epithelial but contains other tissues

Answer 1

epidermis

Question 2

superficial cells in epidermis:

Answer 2

keratinized stratified squamous

Question 3

thickest and thinnest parts of skin

Answer 3

thickest- palms and soles of feet
thinnest- eyelids

Question 4

avascular

Answer 4

epidermis

Question 5

the epidermis has _____________ sensitive to touch

Answer 5

nerve endings

Question 6

cells in ________ of the epidermis are living because those cells receive more nutrients from __________________________________.

Answer 6

lower layers
blood diffusing from dermis to lower epidermis

Question 7

functions of epidermis

Answer 7

-prevents excess water loss
-keeps out pathogens and allergens
-protects from physical harm
-protects from UV
-touch sensations

Question 8

5 distinct layers of the epidermis

Answer 8

1. Stratum corneum
2. Stratum lucidium-only found on thick skin
3. Stratum granulosum
4. Stratum spinosum
5. Stratum germantivum

Question 9

important cells in epidermis

Answer 9

-keratinocytes(90%)
-melanocytes(8%)
-langerhans cells
-merkel cells

Question 10

cells that aid immune system for skin and are easily damaged by UV radiation

Answer 10

langerhans cells

Question 11

cells that sense touch

Answer 11

merkel

Question 12

composed mostly of connective tissue

Answer 12

dermis

Question 13

dense connective tissue that includes touch collagen fibers and elastic fibers

Answer 13

dermis

Question 14

thickest layer of skin

Answer 14

dermis

Question 15

vascular

Answer 15

dermis

Question 16

how is dermis connected to epidermis?

Answer 16

basement membrane

Question 17

dermis is in 2 layers:

Answer 17

papillary(upper) and reticular(lower)

Question 18

boundary between dermis and epidermis uneven because epidermal ridges project inward and __________ extend in those areas.

Answer 18

dermal papillae

Question 19

dermis has nerve endings sensitive to ________________________.

Answer 19

heat, pain, pressure