Dermis & Skins

Question 1

Epidermis

Answer 1

outer later of keratinized stratified squamous epithelium

- forms waterproof surface barrier

Question 2

Dermis

Answer 2

lower, support, later of areolar and sense irregular CT

- contain nerves, blood vessel, etc

Question 3

Hypodermis

Answer 3

layer of adipose tissue that bind skin to deeper tissues

- insulate and cushion the body

Question 4

Stratum Corneum

Answer 4

outer later of dead, keratinized cells

Question 5

Stratum Lucidum

Answer 5

thin, clear later of dead cells found in thick skin only

Question 6

Stratum Granulosum

Answer 6

3-5 layers of flat cells producing keratohyalin granules

Question 7

Stratum Spinosum

Answer 7

thick later of flat, spiny cells where keratinization starts

Question 8

Stratum Basale

Answer 8

deepest later of actively dividing

Question 9

Eccrine Sweat Glands

Answer 9

Produce sweat for evaporative cooling

Question 10

Apocrine Sweat Gland

Answer 10

produce thick, oily secretion in armpit adn groin

Question 11

Sebaceous Glands

Answer 11

produce oily secretion and are associated with hair follicles

• protect and waterproof skin
• Antimicrobial properties

Question 12

Ceruminous Glands

Answer 12

produce earwaax to kill bacteria and trap debris

- found in external audotory canal

Question 13

Mammary Gland

Answer 13

found in breast and produce milk to feed infants

Question 14

Meissner Corpuscles

Answer 14

collection of nerve ending which detect light pressure

- more common is smooth, hairless skin like fingertips

Question 15

Pacinian Corpuscles

Answer 15

detect high frequency vibration

-more sensitve than Meissner Corpuscles

Question 16

Melanin

Answer 16

pigment produced by melanocyes

• protect against UV radiation
• based on genetic and sun exposure

Question 17

Hair

Answer 17

filament of keratinized cells

• divided into bulb, root, and shaft
• one of the fastest growing tissues

Question 18

hair follicle

Answer 18

tube of epidermal cells that support hair

Question 19

Arrector Pili Muscle

Answer 19

smooth muscle that cause hair to stand up

Question 20

Keratinocytes

Answer 20

squamous cells that produce keratin to waterproof skin

Question 21

Melanocytes

Answer 21

produce melanin

-located in Stratum Basale

Question 22

Tactile Cells

Answer 22

detect light touch

-located in stratum Basale

Question 23

Langerhans Cells

Answer 23

phagocytize bacteria and present antigen to immune cells

Question 24

Paillary Layer

Answer 24

upper layer of areolar tissue and blood vessel

-Nutrient delivery& support

Question 25

Reticular Layer

Answer 25

thick, lower layer of dense irregular CT

-strenght & elasticity