Skin & appendages

Question 1

epidermis

Answer 1

outer layer of skin

Question 2

epithelial layer

Answer 2

layer of inside and outside tissue of skin

Question 3

stratum basale

Answer 3

Sits right above the dermis

Where we first generate keratinocytes–> cytokeratin

Helps give our skin our tough outer layer

Where we have rapid cell division

Where we get our skin color

Melanocytes

Question 4

stratum spinosum

Answer 4

Spiny layer

Have shriveled/spiny cells

         -have lost water 

More keratinocytes

Desmosome cells

            -connection between the keratinocytes  

Langerhans Cells

             -Part of the immune system

Question 5

stratum granulosum

Answer 5

a layer of the epidermis that marks the transition between the deeper, metabolically active strata and the dead cells of the more superficial strata
Keratohyalin Granules
Releases lamellar bodies

Question 6

stratum lucidum

Answer 6

Clear layer of the epidermis
Keratinocytes are dead at this level

Question 7

stratum corneum

Answer 7

outermost layer of epidermis
Cells are dead and slough off

Question 8

melanocytes

Answer 8

cells that produce melonin

Question 9

merkel cells

Answer 9

function as touch receptors in association with sensory nerve endings

Question 10

langerhans cells

Answer 10

epidermal macrophages that help activate the immune system

Question 11

keratinocytes

Answer 11

The most abundant epidermal cells, they function mainly to produce keratin

Question 12

Eumelanin

Answer 12

Produces brown to black pigments in the hair

Question 13

Pheomelanin

Answer 13

Produces yellow to red pigments in the hair

Question 14

Dermis

Answer 14

middle layer of skin under the epidermis

Question 15

papillary layer

Answer 15

outer layer of the dermis, directly beneath the epidermis
Nourishes the epidermis
Loose connective tissue
Allows us too perceive touch

Question 16

reticular layer

Answer 16

Deeper layer of the dermis that supplies the skin with oxygen and nutrients
Has dense irregular connective tissue
Sweat glands / hair follicles

Question 17

sebaceous glands

Answer 17

secrete sebum (oil) into the hair follicles where the hair shafts pass through the dermis

Question 18

eccrine sweat glands

Answer 18

respond primarily to elevated body temperature
Palms, feet, forehead

Question 19

apocrine sweat glands

Answer 19

produce true sweat plus fatty substances and proteins; found in the axillary (armpit) and anogenital areas of the body

Question 20

hypodermis

Answer 20

the layer of skin beneath the dermis, which serves as a storage repository for fat
Absorbs fat
Insulates our tissue
Muscle/bone sits right below it

Question 21

Desmosome Cells

Answer 21

connection between the keratinocytes

Holds the cells together

Question 22

Keratohyalin Granules

Answer 22

cross-linking of keratin filaments which creates the tight barrier that is the epidermis, providing the body with an impermeable layer that protects from invasion by foreign particles.

Question 23

Lamellar Bodies

Answer 23

In stratum Granulosum
secreted from keratinocytes, resulting in the formation of an impermeable, lipid-containing membrane that serves as a water barrier and is required for correct skin barrier function