Integument

Question 1

What are the three layers of the integument?

Answer 1

Epidermis
Dermis
Hypodermis

Question 2

Describe the epidermis

Answer 2

A keratinised stratified squamous epithelium that consists of 5 layers. They are
1 stratum basale
2 stratum spinosum
3 stratum granulosum
4 stratum luciderm
5 stratum corneum

Question 3

Describe the shaft of a hair

Answer 3

Made up of three parts
1 medulla-dead soft keratin cells and air space.
2 cortex-dense, pigmented keratin cells.
3 cuticle-a single layer of overlapping, dead keratinised cells.

Question 4

Name the steps of melanin formation

Answer 4

1 tyrosine 
2tyrosinase
3 3,4 dihydroxy phenylalanine
4 dopaquinone
5 melanin
5 cytocrine secretion

Question 5

What mode of secretion is mammary gland lipid secretion?

Answer 5

Apocrine secretion

Question 6

What mode of secretion is mammary gland protein secretion?

Answer 6

Merocrine secretion

Question 7

Describe the two types of sweat glands

Answer 7

Merocrine glands-exocytose water and electrolytes from secretory (columnar or pseudostratified cuboidal epithelium) into duct (cuboidal epithelium) opening onto the surface
Apocrine glands- secreted water lipids and electrolytes via secretory part (simple cuboidal epithelium) and through ducts (straitified cuboidal epithelium) that opens onto the epidermal surface.

Question 8

What kind of secretion is a sebascious gland secretion?

Answer 8

Holocrine secretion of sebum

Question 9

What cells make up anal sacs?

Answer 9

Stratified squamous epithelium

Question 10

Describe the secretion of circumanal glands

Answer 10

Superficially are typical sebaceous glands (holocrine secretion) and deep are hepatoid cells (modified gland)

Question 11

What are the layers of the hoof?

Answer 11

Stratum externum
Stratum medium
Stratum internium

Question 12

What are the three types of neurons?

Answer 12

Bipolar
Unipolar
Multipolar