Epidermis

Question 1

Epidermis is made of (epithelium)

Answer 1

Stratified squamous Epithelium

Question 2

Nutrients and oxygen

Answer 2

Diffuse from capillaries in the dermis

Question 3

Keratinocytes are the body’s

Answer 3

Most abundant epithelial cells

Question 4

Keratinocytes contain

Answer 4

Large amounts of keratin

Question 5

Thin skin

Answer 5

Covers most of the body
Has 4 layers of keratinocytes

Question 6

Thick skin

Answer 6

Covers the palms of the hands and the soles of the feet
Has 5 layers of keratinocytes

Question 7

Stratum basal (germinativum)

Answer 7

Attached to basement membrane by Hemidesmosomes

Forms a strong bond between epidermis and dermis
Contains epidermal ridges
Has many basal cells

Question 8

Epidermal ridges lie next to

Answer 8

Dermal papillae

Question 9

Basal cells , replace

Answer 9

Stem cells that replace superficial keratinocytes

Question 10

Structures of stratum basal

Answer 10

Tactile discs
Melanocytes

Question 11

Tactile discs

Answer 11

Tactile (merkel) cells with sensory nerve endings
Found in hairless skin
Respond to touch

Question 12

Melanocytes

Answer 12

Contain the pigment melanin

Question 13

Stratum spinosum has (number of layers)

Answer 13

8-10 layers of keratinocytes bound by desmosomes

Question 14

Stratum spinosom cells (appear)

Answer 14

Appear spiny

Question 15

Stratum spinosum is produced by

Answer 15

Division of cells in stratum basale some continue dividing

Question 16

Stratum spinosum contains

Answer 16

Dendritic(langerhans)cells which are active in immune response

Question 17

Stratum granulosum has (layers)

Answer 17

3-5 layers of keratinocytes

Question 18

Stratum granulosum is produced from

Answer 18

Cells of stratum spindsum

Question 19

Most cells stop dividing and produce

Answer 19

Keratin
Keratonyalin

Question 20

Keratohyalin (forms) (promotes)

Answer 20

Forms dense granules
Promotes cellular dehydration and cross-linking of keratin fibers

Question 21

After production of proteins cells

Answer 21

Die

Question 22

Stratum lucidum is only found

Answer 22

In thick skin

Question 23

Stratum corneum

Answer 23

Exposed surface of skin
Water resistant

Question 24

Keratinization

Answer 24

The formation of protective layers of cells filled with keratin

Question 25

Water is lost in skin in two way

Answer 25

Insensible perspiration Sensible perspiration

Question 26

Insensible perspiration

Answer 26

Water diffuses and evaporates from top layer of skin Rate increases if stratum corneum is damaged

Question 27

Sensible perspiration

Answer 27

Water excreted by sweat glands

Question 28

The layer of the epidermis that contains abundant desmosomesis the stratum

Answer 28

Spinosum

Question 29

Cells that are in the epidermis that are part of the immune system

Answer 29

Dendritic cells

Question 30

Melanin is produced by melanocytes within the stratum

Answer 30

Basale

Question 31

Vitamin D3 is important for proper

Answer 31

Bone development