Hair and Nails

Question 1

What is the function of hair?

Answer 1

protection, sensation, thermoregulation and communication

Question 2

What is the main protein in hair/nails?

Answer 2

keratin

Question 3

Where is keratin produced?

Answer 3

follicle/nail matrix

Question 4

What makes up a pile sebaceous unit?

Answer 4

hair follicle, hair shaft, erector pilli muscle and sebaceous gland

Question 5

What is the purpose of the sebaceous gland?

Answer 5

lubricate hair and prevent infection

Question 6

Name each hair type and say where they occur

Answer 6

lanugo - foetus and anorexics
vellus - un-pigmented on body
terminal - scalp, beard, pubic

Question 7

Summarise the hair cycle

Answer 7

Anagan - hair grows (scalp= 2-6yrs, brows=months)
Catagen - resting so stops growing
Telogen - shedding

Question 8

Describe how synchronicity relate to hair grows

Answer 8

when born hair grows in sync, stops after a while

Question 9

How does the tester one paradox affect hair growth?

Answer 9

hairs become thick and more pigmented
puberty
due to androgens

Question 10

What is the function of nails?

Answer 10

protection, touch, communication

Question 11

What is the structure of nail?

Answer 11

made of keratin
longitudinal ridging
curvature