Integumentary System

Question 1

“integument” means covering

Answer 1

INTEGUMENTARY SYSTEM (SKIN)

Question 2

the appearance of the integumentary system can
indicate physiological imbalances in the body.

Answer 2

INTEGUMENTARY SYSTEM (SKIN)

Question 3

consists of the skin and accessory structures, such as
hair, glands, and nails

Answer 3

INTEGUMENTARY SYSTEM (SKIN)

Question 4

this system is one of the more familiar systems of the
body to everyone because it covers the outside of the
body is easily observed

Answer 4

INTEGUMENTARY SYSTEM (SKIN)

Question 5

Components of integumentary system:

Answer 5

skin
hair
nails
glands

Question 6

skin functions

Answer 6

-Protection (major function)
-Prevention of water loss from the body surface
Regulation of Heat Loss
-Excretion of urea, uric acid, salt and water
(sweating)
-Vitamin D synthesis
-Sensation

Question 7

SKIN RECEPTORS

Answer 7

1. Free Nerve Endings
2. Ruffinis Corpuscle
3. Krause’s Corpuscle
4. Paccinian Corpuscle
5. Meisner’s Corpuscle – Light Touch
6. Merkels Disc – Light Touch

Question 8

Pain

Answer 8

1. Free Nerve Endings –

Question 9

Warmth/Heat

Answer 9

2. Ruffinis Corpuscle

Question 10

Cold

Answer 10

3. Krause’s Corpuscle

Question 11

Deep Pressure

Answer 11

4. Paccinian Corpuscle

Question 12

Light Touch

Answer 12

5. Meisner’s Corpuscle
6. Merkels Disc

Question 13

1st major skin region (outside)

Answer 13

EPIDERMIS

Question 14

most superficial layer of skin

Answer 14

EPIDERMIS

Question 15

prevents water loss and resists abrasion

Answer 15

EPIDERMIS

Question 16

is a layer of epithelial tissue that rests on the dermis

Answer 16

EPIDERMIS

Question 17

composed of stratified squamous epithelium
(keratinized)

Answer 17

EPIDERMIS

Question 18

its deepest layer, new cells are produced by
mitosis

Answer 18

EPIDERMIS

Question 19

the outermost cells protect the cells underneath,
and the deeper, replication cells lost from the surface

Answer 19

EPIDERMIS

Question 20

Process in which new cells (with keratin) push old cells to surface

Answer 20

Keratinization

Question 21

40-56 days for new cells to reach surface

Answer 21

Keratinization

Question 22

cells move to the surface, lose water, and nuclei change

Answer 22

Keratinization

Question 23

a continuous process

Answer 23

Keratinization

Question 24

the term keratinization reflects the fact that the cells become filled with the protein ___, which makes them more rigid and durable

Answer 24

Keratin

Question 25

gives the stratum corneum its structural strength

Answer 25

Keratin

Question 26

LAYERS OF EPIDERMIS

Answer 26

Stratum Corneum Stratum Lucidum Stratum Granulosum Stratum Spinosum Stratum Basale (Stratum Germinativum)

Question 27

thickest layer of epidermis

Answer 27

Stratum Corneum

Question 28

outermost layers about 20-30 cell layers thick

Answer 28

Stratum Corneum

Question 29

cornified/horny cells – shingle-like dead cells remnants completely filled with keratin

Answer 29

Stratum Corneum

Question 30

coated and surrounded by lipids, which acts as waterproofing material, preventing fluid loss through the skin

Answer 30

Stratum Corneum

Question 31

accounts 75% of epidermal thickness

Answer 31

Stratum Corneum

Question 32

rubs and flakes of slowly and steadily and is replaced by cells produced by the division of the deeper stratum basale cells

Answer 32

Stratum Corneum

Question 33

(lucidus = clear)

Answer 33

Stratum Lucidum

Question 34

more apparent in the hairless thick skin of the palms and soles

Answer 34

Stratum Lucidum

Question 35

consists of 3-5 layers of clear, flat, dead cells

Answer 35

Stratum Lucidum

Question 36

contains intermediate substance eleidin that is transformed into keratin

Answer 36

Stratum Lucidum

Question 37

combination of accumulating water repellant keratin inside them and its increasing distance from the blood supply (in the dermis) effectively dooms the stratum lucidum cells due to inability to get adequate nutrients and oxygen

Answer 37

Stratum Lucidum

Question 38

consists of 3-5 layers of flattened cells that develop darkly staining granules called keratohyaline (prescursor of keratin)

Answer 38

Stratum Granulosum

Question 39

keratin molecules assemble into intermediate filaments that form a barrier to protect deep layers from injury and microbial invasion and make the skin waterproof

Answer 39

Stratum Granulosum

Question 40

contains 8-10 layers of polyhedral (many sided) cells that fit closely together

Answer 40

Stratum Spinosum

Question 41

cells are covered with prickly spines

Answer 41

Stratum Spinosum

Question 42

contains 8-10 layers of polyhedral (many sided) cells that fit closely together

Answer 42

Stratum Spinosum