Integument

Question 1

Three categories of hair

Answer 1

1. Primary or Guard hairs
2. Secondary or Wool Hairs
3. Tactile or Sinus Hairs

Question 1

The three layers of skin

Answer 1

1. Epidermis
2. Dermis
3. Hypodermis

Question 2

Two types of sweat glands and the difference between them

Answer 2

1. Eccrine Gland - Empties onto the surface
2. Apocrine Gland - Empties into a hair follicle

Question 3

Where are sebaceous glands not found?

Answer 3

paw pads and planum nasale

Question 4

Principal cells found in the Epidermis

Answer 4

Keratinocytes, Melanocytes, Merkel, and Langerhans cells

Question 5

The 4 types of tissue

Answer 5

Epithelial tissue, connective tissue, muscle tissue, and nervous tissue

Question 7

The part of the hair that is visible above the skin is called the ________, and the portion of the buried within the skin is called the _______.

Answer 7

Shaft & Root

Question 8

Name the layers of the epidermis from deepest to superficial

Answer 8

Stratum Basale, Stratum Granulosum, Stratum Lucidum, Stratum Lucidum

Question 9

What is pruritus

Answer 9

Itchiness

Question 10

What are 6 functions of skin?

Answer 10

1. Protect, cover and line.
2. Filter biochemical substances.
3. Absorb nutrients
4. Provide sensory input
5. Manufacture secretions
6. Manufacture excretions

Question 11

Made of 4-5 layers

Answer 11

Epidermis

Question 12

Only found in thick skin

Answer 12

Stratum Lucidium

Question 13

Cells give up vital organelles and nuclei to make room for Which tough, protective substance.

Answer 13

keratin

Question 14

At the epidermal-dermal junction which cells found in small numbers are always associated with a sensory nerve

Answer 14

Merkel Cells

Question 15

What layer lies just beneath the epithelial layer of the epidermis and is composed of loose conective tissue with loosely woven fibers and ground substance.

Answer 15

Papillary layer

Question 16

Where can simple epithelium be found?

Answer 16

Protected areas: internal compartments, ducts, vessels, and passageways.

Question 17

Where can stratified squamous epithelium be found?

Answer 17

Areas where cells must reproduce rapidly: vagina, mouth, anus.

Question 18

What is the top of a dog’s nose also known as?

Answer 18

Planum nasale

Question 19

What are the 3 types of cellular junctions found between epithelial cells?

Answer 19

1. Tight junction
2. Desmosomes
3. Gap Junctions

Question 20

Name 4 glands of the skin

Answer 20

1. Sebaceous glands
2. Sweat glands
3. Tail Glands
4. Anal Sacs

Question 21

What type of muscle is the arrector pili muscle?

Answer 21

Smooth muscle

Question 22

What are tail glands thought to assist with?

Answer 22

Recognition and identification of other animals

Question 23

What glands are found in the external ear canal of dogs?

Answer 23

Apocrine sweat glands

Question 24

what are the 3 layers of hair

Answer 24

outer layer- cuticle

middle layer - cortex

intermost layer - medulla

Question 25

what muscle makes the hair stand up

Answer 25

arrector pilli muscle

Question 26

what kind of muscle is the arrector pilli

Answer 26

smooth muscle

Question 27

The skin is responsible for the production of which vitamin?

Answer 27

Vitamin D

Question 28

Which gland produces sebum?

Answer 28

Sebaceous

Question 29

What 2 layers is the dermis composed of ?

Answer 29

Papillary and Reticular

Question 30

Why does hair turn grey or white as animals age?

Answer 30

Melanin production decreases. The cortex loses its pigment entirely and the medulla becomes filled with air.

Question 31

The period of transition between the anagen and telogen phase is called?

Answer 31

The catagen phase

Question 32

What causes pigmentation of skin?

Answer 32

The presence or absence of melanin granules in the armlike extensions in the melanocytes.

Question 33

What waterproofs the skin and gives it strength?

Answer 33

Keratinocytes

Question 34

Where are keratinocytes found?

Answer 34

Stratum Basale

Question 35

Superficial layer of the epidermis

Answer 35

Stratum Corneum

Question 36

Composed of areolar tissue containing adipose, blood and lymphatic vessels, and nerves

Answer 36

Hypodermis

Question 37

What cells are produced in the bone marrow?

Answer 37

Langerhans Cells

Question 38

What cell is associated with sensory nerve endings?

Answer 38

Merkel Cells

Question 39

Name the principle cells found in the Epidermis?

Answer 39

Keratinocytes, Melanocytes, Merkel cells, and Langerhans cells.

Question 40

Where is the pacinian corpuscle located?

Answer 40

The hypodermis

Question 41

What protects the keratinocytes from UV radiation?

Answer 41

Melanin