Integumentary Definitions

Question 1

Integument

Answer 1

cutaneous membrane and accessory structures

Question 2

Epidermis

Answer 2

stratified squamous epithelium

Question 3

Dermis

Answer 3

underlying connective tissue

Question 4

Hypodermis

Answer 4

adipose and areolar

Question 5

Keratinocytes

Answer 5

the most abundant epithelial cells in the body

Question 6

Stratum germinativum

Answer 6

divide by mitosis

provides the replacement cells for the upper layers

Question 7

Hemidesmosomes

Answer 7

bink stratum germinativum to the basement membrane (epidermal ridges and dermal papillae)

Question 8

Dermatoglyphs

Answer 8

finger prints

Question 9

Desmosomes

Answer 9

holds stratum spinosum together

Question 10

Stratum granulosum

Answer 10

produce large about of keratin

Question 11

Stratum lucidum

Answer 11

only in thick skin, flat densely packed cells, no organelles large amounts on keratin

Question 12

Insensible perspiration

Answer 12

evaporation of interstitial fluid

Question 13

Sensible perspiration

Answer 13

evaporation by fluids produced by sweat glands

Question 14

Melanocytes

Answer 14

produces melanin and package it into melanosomes, located in stratum germinativum

Question 15

Calcitriol

Answer 15

needed for proper absorption of calcium and phosphorous by the small intestine

Question 16

Epidermial Growth Factor (EGF)

Answer 16

Produced in salivary glands, stimulated cell division, accelerated keratin production, promotes healing n

Question 17

Collagen

Answer 17

for strength and to resist stretching

Question 18

Elastic fibers

Answer 18

for flexibility

Question 19

Lines of cleavage

Answer 19

lines representing parallel bundles of collagen

Question 20

Cutaneous plexus

Answer 20

network of arteries located in the hypodermis

Question 21

Hair root

Answer 21

portion that anchors the hair into the skin

Question 22

Hair shaft

Answer 22

part which is seen on the surface

Question 23

Lanugo

Answer 23

fine, unpigmented embryonic hairs

Question 24

Vellus hairs

Answer 24

peach fuzz

Question 25

Terminal hairs

Answer 25

heavy, more deeply pigmented hairs

Question 26

Merocrine

Answer 26

secretion by exocytosis into the lumen; e.g., mucous secretion

Question 27

Holocrine

Answer 27

the entire cell containing the secretory material is shed

Question 28

Endocrine

Answer 28

exocytosis into the bloodstream

Question 29

Apocrine

Answer 29

apical cytoplasm contains the material to be secreted and is pinched-off and released into the lumen

Question 30

Ercrin glands

Answer 30

secret directly to the surface of the skin