Epidermis

Question 1

Also called the integument which simply means _____, the skin multi-tasks.

Answer 1

“covering”

Question 2

Its function goes well beyond serving as a large opaque bag for body contents.

Answer 2

Integumentary system

Question 3

The uppermost layer of the skin is full of ________ and is cornified, or hardened to help prevent water loss from the body surface.

Answer 3

Keratin

Question 4

Located in the skin are converted to vitamin D by sunlight.

Answer 4

Modified cholesterol molecules

Question 5

Functions of the integumentary system protects deeper tissue from:

Answer 5

• Mechanical damage
• Chemical damage
• Ultraviolet radiation
• Thermal damage
• Dessication

Question 6

By activating sweat glands and by allowing blood to flush into skin capillary so that heat can radiate from the skin surface.

Answer 6

Heat loss

Question 7

By not allowing blood to flush into skin capillary beds.

Answer 7

Heat retention

Question 8

Which are actually part of the nervous system, are located in the skin.

Answer 8

Cutaneous sensory receptors

Question 9

Cutaneous sensory receptors, tiny sensors, which include:

Answer 9

• touch
• pressure
• temperature
• pain receptors

Question 10

The skin is composed of two kinds of tissue:

Answer 10

Epidermis & dermis

Question 11

Epidermis is made up of.

Answer 11

Stratified squamous epithelium

Question 12

That is capable of keratinizing, or becoming hard & tough.

Answer 12

Stratified squamous epithelium

Question 13

The Underlying dermis is made up of mostly.

Answer 13

Dense connective tissue

Question 14

Allowing interstitial fluid to accumulate in the cavity between the layers, which results in a_____.

Answer 14

blister

Question 15

Deep to the dermis is the _______.

Answer 15

Subcutaneous tissue or hypodermis

Question 16

Essentially is adipose tissue

Answer 16

Cutaneous tissue or hypodermis

Question 17

It is not considered part of the skin, but it does anchor the skin to underlying organs and provides a site for nutrient (fat) storage.

Answer 17

Subcutaneous tissue or hypodermis

Question 18

Also, serve as a shock absorber and insulate the deeper tissues from extreme temperature changes occurring outside the boys.

Answer 18

Subcutaneous tissue or hypodermis

Question 19

It is also responsible for the curves that are more a part of a woman’s anatomy than a man’s.

Answer 19

Subcutaneous tissue or hypodermis

Question 20

The epidermis is composed of up to five layers or strata:

Answer 20

• stratum basale
• spinosum
• granulosum
• lucidum
• corneum

Question 21

Like all other epithelial tissues, the epidermis is______. It has no blood supply of its own.

Answer 21

Avascular

Question 22

Most cells of the epidermis are.

Answer 22

Keratinocytes

Question 23

Which produces keratin, the fibrous protein that makes the epidermis a tough and protective layer.

Answer 23

Keratinocytes (keratin cells)

Question 24

The deepest cell layer of the epidermis, liest closest to the dermis and is connected to it along a wavy borderline that resembles corrugated cardboard.

Answer 24

Stratum basale

Question 25

Alternate name of stratum basale

Answer 25

Stratum germinativum

Question 26

Contains the adequately nourished of the epidermal cells because nutrients diffusing from the dermis reach them first.

Answer 26

Stratum basale

Question 27

As they move away from the dermis and become part of the more superficial layers, the ________, and then the ________, they become flatter and increasingly full of keratin.

Answer 27

Stratum spinosum and stratum granulosum

Question 28

As they leave the stratum granulosum, they die, forming the clear______

Answer 28

Stratum lucidum

Question 29

This latter epidermal layer is not present in all skin regions. It occurs only where the skin is hairless and extra thick, that is, in the palms of the hands and soles on the feet.

Answer 29

Stratum lucidum

Question 30

The outermost layer, is 20 to 30 later cell layers thick but it accounts for about three- quarters of the epidermal thickness.

Answer 30

Stratum corneum

Question 31

The shinglelike dead cell remnants, completely filled with keratin, are referred to as.

Answer 31

Cornified or horny cells

Question 32

We have a total “new” epidermis every

Answer 32

25 to 45 days

Question 33

A pigment that ranges in color from yellow to brown to black

Answer 33

Melanin

Question 34

is produced by special spider-shaped cells called, found chiefly in the stratum basale.

Answer 34

Melanocytes

Question 35

As the melanocytes produce melanin pigment, it accumulates within them in membrane-bound granules called

Answer 35

Melanosomes

Question 36

Are seen where melanin is concentrated in one spot.

Answer 36

Freckles and moles

Question 37

Scattered in the epidermis, which are important in alerting in alerting and activating immune system cells to a threat such as bacterial or viral invasion.

Answer 37

Epidermal dendritic cells

Question 38

Seen here and there at the epidermal- dermal junction are:

Answer 38

Merkel cells

Question 39

Merkel cells, which are associated with sensory nerve endings and serve as touch receptors called

Answer 39

Merkel discs

Question 40

Cells are dead; represented only by flat membranous sacs filled with keratin. Glycolipids in extracellular space.

Answer 40

Stratum corneum

Question 41

Cells are flattened, organelles are deteriorating; cytoplasm full of granules .

Answer 41

Stratum granulosum.

Question 42

Cells contain thick bundles of intermediate filaments made of pre- keratin.

Answer 42

Stratum spinosum

Question 43

Cells are actively dividing stem cells; some newly formed cells become part of the more superficial layers.

Answer 43

Stratum basale