Lab 5 Wts Cards

Front 1

What is the difference between a paper cut that bleeds and one that doesn't

Back 1

Because there is no bleeding, the cut has penetrated into the avascular epidermis only.

Front 2

Were is the most adipose tissue

Back 2

Hypodermis

Front 3

What layer of skin contains the larges variety of functioning structures

Back 3

Dermis

Front 4

What Layer of Skin has five different strata

Back 4

epidermis

Front 5

Which one of the five strata has the oldest cells

Back 5

Basale b/c of contain stem cells

Front 6

What strata has stem cells and what do they do

Back 6

Stratum Germinativum/Basale layer which generates new stem cells

Front 7

Types of cells found in Epidermis

Back 7

Keratinocytes
Melanocytes
Langerhans Cells
(epidermal dendritic cells)
Tactile Cells
(merkel Cells)

Front 8

Keratinocytes

Back 8

Produce Karatin
Karatinization begins at s. granulosum

Front 9

Problems Karatinocytes can lead to

Back 9

Callus

Front 10

Melanocytes

Back 10

- Produce Melanin in membrane bound granules called melanosomes
-Melanosomes move along actin by "spider arms" and accumlate in keratinocytes' sunny side and protect DNA from UV radiation
-Found in stratum Basale

Front 11

Problems melanocyte can lead to

Back 11

Melanoma
Vitiligo
Nevus (mole)
Freckle
Suntan

Front 12

epidermal dendritic cells

Back 12

(Langerhans Cells)
Found in epidermis
- Ingest foreign substances
-activate immune system
-produced by bone marrow

Front 13

tactile cells

Back 13

(merkel cells)
-Act as sensory receptors for touch
-Tactile Cell and disc-like sensory neuron ending = tactile disk (Merkel Disk)

Front 14

Layers of Epidermis in order

Back 14

Stratum Basale
Stratum Spinosum
Stratum Granulosum
Stratum Lucidum (only in thick skin
Stratum Corneum

Front 15

Stratum Corneum

Back 15

- No nutrients -> dead
- hard or "horny" layer
-Makes up 3/4 of epidermis' thickness
-Karatin and thick cell membrane protects skin against abrasion and penetration
-Glycolipid makes skin waterproof

Front 16

Problems Corneum can lead to

Back 16

-Water can get stuck under dead cells and causes buckling of corneum sheets (prune-y hands)

Front 17

Stratum Lucidum

Back 17

- No Nutrients -> dead
- "Clear layer"
FOUND ONLY IN THICK SKIN

Front 18

THICK SKIN

Back 18

Found in Palms and soles of feet

Front 19

Stratum Granulosum

Back 19

- "Granule Layer"
- Karatination begins here
- This is known as the "toughening up layer" b.c it produces kartinohyaline granules (->Keratin) and lamellated granules (-> glycolipd)
-also barrier against bloods nutrients to higher strata
-reason why s corneum and lucidum have only dead cells

Front 20

Stratum spinosum

Back 20

- Has lots of melanin granules and epidermal dendritic cells
- "spiny Layer

Front 21

Problems spinosum can lead to

Back 21

Squamous cell carcinoma

Front 22

3 Main contributings factors that make skin tone

Back 22

Melanin, Carotene, Hemoglobin

Front 23

Melanin

Back 23

(in deep layers of epidermis)--> dark skin

Front 24

Carotene

Back 24

in s. corneum of epidermis --> yellow skin

Front 25

Hemoglobin

Back 25

in blood --> pink tinge to skin

Front 26

2 Dermal Layers

Back 26

Papillary
Reticular

Front 27

Papillary Layer Contains

Back 27

- Contains dermal papillae, which has friction ridges and sweat, cause person to leave finger prints on surfaces
- Also contains blood vessels and the end of sensory nerve fibers (AKA free nerve endings)

Front 28

Papillary Layer Made of

Back 28

-made of Areolar Connective tissue
-Loose packing cells and lots of blood vessels --> looseness of connective tissue allows for free patrolling of phagocytes and other defenders
-Collagen Fibers -> strength and resiliency
Contains dermal Papillae
-Elastic Fibers -> stretch-recoil

Front 29

Dermal Papillae

Back 29

Found in Dermal Papillary layer, has friction ridges and sweat, which cause person to leave finger prints on surfaces

Front 30

Reticular Layer Contains

Back 30

- Contains Hair Follicles and hair bulbs
- sebaceous glands
- sweat glands
-Blood vessels
- Sensory Nerve Fibers,
- Pacinian Corpuscles
- Arrector Pili Muscle

Front 31

Reticular Layer Made Of

Back 31

-Dense Irregular Connective tissue
-Collagen Fibers -> strength
-Elastic Fibers -> stretch-recoil

Front 32

Striae

Back 32

(Stretch Marks)

Front 33

Blisters

Back 33

Separation of epidermis from dermis

Front 34

First Degree Burns

Back 34

Involves epidermis (red painful) aka sunburn

Front 35

Second-Degree burn

Back 35

Involves epidermis and dermis
Blisters and or bleeding
layers of skin missing,

Front 36

Third Degree burn

Back 36

Involves Epidermis Dermis and Hypodermis
Black Charred and or white
muscle and bone may be visible
No pain at burn
Sever pain surround burn especially during recovery

Front 37

Why is sweat so important what is the danger of not having sweat glands

Back 37

Sweat is important for homeostasis without sweat glands we could more easily overheat

Front 38

What are two things your body can do to maintain your body temperature when you are exercising or getting hot.

Back 38

Sweat
Dilate capillaries

Front 39

Why does your skin turn red when you are warm

Back 39

Because vessels dilating releasing blood to surface of skin

Front 40

What should you watch out when you have a fever and are perspiring profusely

Back 40

Dehydration

Front 41

Why does your hair and skin near your hair get oily faster than other parts of your body

Back 41

Because sebaceous glands do not have individual duct so uses hair follicle as duct

Front 42

Pacinian Corpuscles

Back 42

a type of touch receptor located in the skin that is receptive to deep pressure

Front 43

Arrector Pili Muscle

Back 43

are small muscles attached to hair follicles in mammals. Contraction of these muscles causes the hairs to stand on end and goosebumps