Lecture 12

Question 1

What is the main type of cell within the epidermis?

Answer 1

Keratinocytes

Question 2

What do keratinocytes eventually become?

Answer 2

Corneocytes

Question 3

How to keratinocytes get their pigment?

Answer 3

Transferred to them by melanosomes of the melanocytes

Question 4

What are the names of the four main layers of the epidermis?

Answer 4

1. Stratum corneum
2. Stratum granulosum
3. Stratum spinosum
4. Stratum Basale

Question 5

What is the function of desmosomes?

Answer 5

Connection between individual cells

Question 6

What is the function of hemidesmosomes?

Answer 6

Anchors the epidermis and the dermis together

Question 7

What is the main component of the dermis?

Answer 7

Consists mainly of collagen

Question 8

What is the three main functions of hair follicles?

Answer 8

• physical barrier
• UV protection
• Thermo-regulation

Question 9

What are the two different type of hair follicles within a dogs coat?

Answer 9

• primary guard hair outercoat

- secondary soft hair undercoat

Question 10

What are the five main stages of hair development?

Answer 10

	Anagen- active phase
	Catagen- regression phase 
	Telogen- resting phase
	Exogen- shedding phase 
	Kenogen- empty follicle after exogen

Question 11

What is the main function of a sebacceous gland?

Answer 11

to secrete sebum

Question 12

What is an apocrine sweat gland normally associated with?

Answer 12

a hair follicle