CH 6 Integumentary System

Question 1

List the epidermal layers of thin skin from the most superficial (at the top) to the deepest layer (at the bottom)

Answer 1

Corneum
Lucidium
Granulosum
Spinosum
Basal

Question 2

Describe the each epidermal layer with its character

Answer 2

Corneum- Lots of keratinized dead cells that are flattened
Lucidium-
Granulosum- 3-5 layers of flattened granular cells, contains shrunken nuclei and keratin
Spinosum- Many layers of cells with central located oval nucleus’s && developing keratin fibers, cells BECOMING flattened
Basal- single row of cubed cells, here is where cells divide and grow(melanocytes)

Question 3

What type of tissue is each epithelial layer made of?

Answer 3

Epidermis- stratified squamous epithelium
Dermis- dense connective tissue
Hypodermis- areolar and adipose tissue

Question 4

dendrite cells function

Answer 4

phagocytes; Protect against viruses/invasions

Question 5

tactile cells function

Answer 5

detects touch

Question 6

Define Melanocytes

Answer 6

produces melanin, to protects against UV rays

Question 7

What are the layers of the dermis called and their roles?

Answer 7

Dermal Papillae (superficial)
increased surface area where epithelial cells receive oxygen
ex; finger print
Recticular Layer(deep)
Composed of dense irregular tissue
Makes skin tough and elastic

Question 8

Connective tissue, with collagenous and elastic fibers, muscle, blood, nervous tissue
what layer is this?

Answer 8

dermal layer

Question 9

Insulating layer; Contains blood vessels that supply skin
what layer is this?

Answer 9

hypodermis

Question 10

Where can langerhans cells be found?

Answer 10

Stratum spinosum

Question 11

Where can Merkel cells be found

Answer 11

stratum basale

Question 12

Where can melanocytes be found?

Answer 12

Stratum basale

Question 13

What layer contains hair follicles, sweat and sebaceous glands

Answer 13

Dermis

Question 14

what is the difference between sebaceous and apocrine glands

Answer 14

Sebaceous - sweat glands
+to keep hair and skin soft and waterproof
Apocrine- active during puberty

Question 15

What accessory structures that are missing from the skin of the soles of the feet and the palms of the hands, but found elsewhere in the skin of the body

Answer 15

hair and sebaceous glands

Question 16

What glands function is to lower body temperature ?

Answer 16

Eccrine (Merocine) gland

Question 17

The epidermis is avascular (lacks blood vessels). Therefore, oxygen, nutrients, and wastes must diffuse to and from blood vessels found in what region of the skin?

Answer 17

Subcutaneous layer

Question 18

Within the skin, the ______ is the thicker layer composed primarily of connective tissue, while the ______ layer is composed of stratified squamous epithelium

Answer 18

dermis; epidermal

Question 19

Secrete ear wax into external ear canal

Answer 19

Ceruminous glands

Question 20

What are the skins function ?

Answer 20

To protect, sense touch, excrete and regulate body temperature

Question 21

partial thickness (first degree) burn

Answer 21

only epidermis is affected
ex;sumburns
no scarring is left

Question 22

deep partial thickness (2nd degree burn)

Answer 22

epidermis and part of dermis is affected
2-4 weeks or longer to heal
mScarring might be left

Question 23

Full thickness (3rd degree burn)

Answer 23

affects all three layers
often requires skin graft/replacement