Integument 3

Question 1

Name 2 functions of the hair coat

Answer 1

Temperature control and Camouflage

Question 2

True or False Hairs are made of live epithelial cells

Answer 2

False Hairs are made of dead epithelial cells

Question 3

The name of the part of the hair that is visible above the skin

Answer 3

The shaft

Question 4

The name of the part of the hair that anchors it to the skin

Answer 4

The hair follicle

Question 5

What happens in the hair Matrix also known as the growth zone?

Answer 5

This is where the rapidly dividing cells in the hair follicle reside. These cells go on to keratinize and become the hair

Question 6

What is the root hair plexus?

Answer 6

A web of sensory nerve endings that surround the hair root making it an important sensory organ.

Question 7

What are the 3 cycles of hair growth

Answer 7

Anagen, Catagen and Telogen

Question 8

Why do hairs turn white and then gray as an animal ages?

Answer 8

As the animal ages melanin production in the growth zone decreases and eventually when the hair becomes white the cortex loses its pigment entirely and the medulla becomes air-filled

Question 9

What factors stimulate contraction of the arrector pili muscles?

Answer 9

Fear and cold.

Question 10

Name 2 types of sweat gland? How are they different from one another?

Answer 10

Apocrine (empty into hair follicles) Eccrine (empty onto the skin)

Question 11

Where are anal sacs found and what is their importance to animals?

Answer 11

On either side of the anus and they used for scent marking