Ch 5 pt 1

Question 1

integumentary system

Answer 1

skin and its derivatives

Question 3

epidermis

Answer 3

outermost protective shield of the body; composed of avascular, keratinized stratified squamous epithelium

Question 4

cells of the epidermis

Answer 4

keratinocytes, melanocytes, langerhan’s cells, Merkel cells

Question 5

location of stratum corneum

Answer 5

outermost layer

Question 6

structure of stratum corneum

Answer 6

20 to 30 layers of DEAD keratinized cells

Question 7

function of stratum corneum

Answer 7

PROTECTION

Question 8

location of stratum lucidum

Answer 8

present ONLY in thick skin

Question 9

Structure of stratum lucidum

Answer 9

thin, translucent band of clear, flat, DEAD keratinized cells

Question 10

structure of stratum granulosum

Answer 10

3 to 5 layers of LIVING cells; keratinocytes accumulate granules

Question 11

structure of stratum spinosum

Answer 11

several LIVING cell layers containing web-like system of filaments, melanin granules, and langerhan’s cells

Question 12

location of stratum basale

Answer 12

deepest epidermal layer; firmly attached to the dermis

Question 13

structure of stratum basale

Answer 13

single row of the youngest LIVING keratinocytes; contains melanocytes and Merkel cells

Question 14

function of stratum basale

Answer 14

highly mitotic

Question 15

dermis

Answer 15

second major skin region

Question 16

components of the dermis

Answer 16

• strong, flexible, Fibrous connective tissue
• highly innervated and vascuarized
• hair follicles, oil sweat glands

Question 17

cells of the dermis

Answer 17

typical connective tissue cells

Question 18

layers of the dermis

Answer 18

papillary layer and reticular layer

Question 19

papillary layer

Answer 19

thin, superficial layer of highly vascular areolar connective tissue; responsible for fingerprints

Question 20

reticular layer

Answer 20

deeper layer of dense irregular connective tissue

Question 21

location of the hypodermis

Answer 21

subcutaneous layer deep to the skin

Question 22

structure of the hypodermis

Answer 22

mostly adipose tissuef

Question 23

function of the hypodermis

Answer 23

stores fat

Question 24

melanin

Answer 24

yellow to reddish-brown to black pigment; individual and racial differences in skin coloring reflect the kind of amount of melanin made

Question 25

carotene

Answer 25

yellow to orange pigment; most obvious in the palms and soles of the feet

Question 26

hemoglobin

Answer 26

oxygenated hemoglobin in the blood is responsible for the pinkish hue of skin