Lecture 10 - Integument part II

Question 1

What is dermis?

Answer 1

CT layer deep to epidermis

Question 2

What lays inbetween the s. basale and the dermis?

Answer 2

Basement membrane

Question 3

What is the function of the dermis?

Answer 3

Nourishes epidermis, highly vascularized

Question 4

What are langer lines the purpose?

Answer 4

determines tension and wrinkles in skin lines

Question 5

What are langer lines made of?

Answer 5

Pattern distribution of Type I collagen fibers

Question 6

Why is it important to know where langer lines are?

Answer 6

determines pace and nature of wound healing

Question 7

What are the layers of the dermis?

Answer 7

Papillary and reticular

Question 8

What is the papillary layer made up of?

Answer 8

loose connective tissue

Question 9

How does it interact with the epidermis?

Answer 9

Interdigitates with epi. still seperated by basement membrane

Question 10

What are the interdigitations between the epidermis and dermis called?

Answer 10

Rete apparatus

Question 11

What fibers are with in the papillary layer?

Answer 11

Collagen fibers (I and III), elastic fibers, and anchoring fibers

Question 12

Where are the anchoring fibers originating from?

Answer 12

Basal lamina

Question 13

What is the reticular layer made from?

Answer 13

Dense irregular connective tissue

Question 14

What fiber types are with in the reticular layer?

Answer 14

Type I collagen fiber and thick elastic fibers

Question 15

What other cell types are with in the reticular layer?

Answer 15

smooth muscle cells

Question 16

What is the purpose of smooth muscle cells with in the reticular layer?

Answer 16

arrector pilli

Question 17

What other structures reside within the reticular layer?

Answer 17

Epidermally derived glands and hair follicles

Question 18

What is a first degree burn?

Answer 18

just epidermis destroyed

Question 19

What is a second degree burn?

Answer 19

Epidermis + dermis are destroyed (blistering)

Question 20

What is a third degree burn?

Answer 20

Epidermis + dermis + hypodermis

Question 21

What are considered appendages of the skin?

Answer 21

Claws, nails, hair, sweat glands, and sebaceous glands

Question 22

What is hair made of?

Answer 22

elongated keratinized structures derived from invaginations of epidermal epithelium

Question 23

What causes shedding?

Answer 23

An increased turn over rate of hair

Question 24

What is a claw composed of?

Answer 24

Plate of keratinized epithelial cells

Question 25

What do sebaceous glands produce?

Answer 25

sebum, waxy texture

Question 26

Where are there no sebaceous glands?

Answer 26

Palms, soles, and sides of feet

Question 27

Where are sebaceous glands located?

Answer 27

within fibrous sheath surrounding each hair folicle

Question 28

Why might sebaceous glands be around hair follicles?

Answer 28

aid in hair flexability and proper skin texture

Question 29

What else is grouped with sebaceous glands and hair follicles?

Answer 29

arrector pilli muscles

Question 30

What is sebum made up of?

Answer 30

cholesterol, triglycerides, anf cell debris

Question 31

What method of secretion do sebaceous glands use?

Answer 31

Holocrine

Question 32

What happens with holocrine secretion?

Answer 32

as secretory cell matures, it dies and becomes part of secretory product

Question 33

What is the acinus?

Answer 33

Basal layer of undifferentiated flattened epithelial cells resting on basal lamina

Question 34

What do acinus cells have with in them?

Answer 34

Alot of lipid filled vacuoles

Question 35

What are the two types of sweat glands?

Answer 35

Eccrine and apocrine

Question 36

What is eccrine secretions used for?

Answer 36

temp regulation

Question 37

What are apocrine secretions used for?

Answer 37

other uses (ie. temp regulation, sex glands)

Question 38

What kind of gland structure is the eccrine gland?

Answer 38

simple coiled tubular glands

Question 39

Where are eccrine glands located on dogs?

Answer 39

Tongue and foot pads

Question 40

Where do these ducts open? What are they associated with?

Answer 40

On skin surface, out of sweat pores. Associated with nothing

Question 41

What kind of secretion does eccrine do?

Answer 41

merocrine secretion

Question 42

What is merocrine secretion?

Answer 42

excocytosis, cells are not damages during secretion

Question 43

What is cytocrine secretion?

Answer 43

Cell not damaged but part of it gone

Question 44

What do eccrine glands have to help move along secretions?

Answer 44

myepithelial cells

Question 45

Where do apocrine glands come from?

Answer 45

Epithelium of hair folicle

Question 46

What layer is the apocrine gland located in?

Answer 46

Dermis and hypodermis

Question 47

Where are there always apocrine glands?

Answer 47

axilla, areola, and anal regions

Question 48

What do dogs and cats use them for primarily?

Answer 48

thermoregulation

Question 49

Where do apocrine glands open up?

Answer 49

just superficial to entry of the sebaceous gland

Question 50

What do apocrine secretions contain?

Answer 50

pheromones

Question 51

What is special about axillary apocrine glands?

Answer 51

secrete milky product, odorless until metabolized by bacteria

Question 52

Which sweat gland is larger?

Answer 52

Apocrine gland

Question 53

Where is the secretory product of apocrine glands stored?

Answer 53

lumen