Lec exam 2 Integumentary system

Question 1

The integument accounts for what percentage of our body weight?

Answer 1

8-15%

Question 2

Cutaneous membrane

Answer 2

skin

Question 3

Integument

Answer 3

is the skin that covers your body

Question 4

What consists of the integumentary system?

Answer 4

Skin; Nails, hair, sweat glands and sebaceous glands

Question 5

The scientific study and treatment of the integumentary system is ?

Answer 5

dermatology

Question 6

What is the skins function?

Answer 6

barrier and protection

and visual indicator of our physiology and health

Question 7

The integument consists of two distinct layer called?

Answer 7

Epidermis and Dermis

Question 8

What is the epidermis made up of ?

Answer 8

keratinized, stratified squamous epithelium

Question 9

What is the dermis composed of?

Answer 9

dense irregular connective tissue

Question 10

What are the functions of the Epidermis?

Answer 10

Protection
Immunity
Prevention of water loss 
Skin color 
Metabolic Regulation 
secretion and absorption

Question 11

How does the epidermis protect?

Answer 11

acts as a physical barrier

protects against extreme temperatures and chemicals

Question 12

Immunity in the epidermis

Answer 12

Dendritic cells within stratum spinosum in epidermis

Initiate immune response against pathogens and cancer cells

Question 13

Prevention of water loss in epidermis

Answer 13

Helps prevent unnecessary water loss
Water unable to exit skin unless secreted by sweat glands
- Selectively Permeable
-Transpiration

Question 14

Transpiration

Answer 14

fluids penetrate through the epidermis and then evaporate into the surrounding air

Question 15

Metabolic regulation in the epidermis

Answer 15

UV rays hit skin and melanin is produced

Question 16

Secretion and Absorption in epidermis

Answer 16

materials secreted by dermal structures are released onto the epidermal surface. Skin is selectively permeable

Question 17

What are the functions of the dermis ?

Answer 17

Temperature regulation
secretion and absorbtion
sensory reception

Question 18

Temperature regulation in dermis

Answer 18

dilate blood vessels release heat
constrict blood vessels conserve heat
sweat glands release fluid

Question 19

Sensory reception in dermis

Answer 19

detect and relay pain

Question 20

Secretion and absorption in dermis

Answer 20

urea, salt and water secreted onto skin during sweating

Sebaceous glands- secrete sebum which lubricates skin and hair

Question 21

Transdermal administeration

Answer 21

some oil soluble drugs delivered by adhesive patch

Question 22

What are the cell types ?

Answer 22

Keratinocytes, melanocytes and tactile cells

Question 23

The epithelium of the integument is termed

Answer 23

epidermis

Question 24

Keratinocytes

Answer 24

synthesis of keratin which strengthens the epidermis

Question 25

Melanocytes

Answer 25

produce and store melanin in response to UV light exposure

Question 26

Tactile cells

Answer 26

when compressed they release chemicals that stimulate nerve endings which provide information about object touching the skin

Question 27

Name the 5 layers of the integumentary system from deep to superficial

Answer 27

Stratum basale, spinosum, granulosum, lucidum, corneum

Question 28

What epidermis layers have living keratinocytes ?

Answer 28

First 3 layers

Question 29

What layers have dead keratinocytes

Answer 29

top 2 layers

Question 30

What separated the epidermis from the dermis?

Answer 30

stratum basale

Question 31

What layer is known as the spiny layer ?

Answer 31

stratum spinosum

Question 32

Keratinization

Answer 32

serves as a layer that resists abrasion
-keratinocytes fill with keratin and the organelles disintegrate and the cell dies
not complete until it reaches the top layer