Structure of the hair
What is the scientific study of hair and its disease and care is called?
Trichonology
Two main types hair found on the body
Vellus and terminal hair
Name the three side bonds inside the polypeptide chain that makes up the cortex
Hydrogen
salt
disulfide
Name two types of melanin
eumelanin and pheomelanin
Also known as male pattern baldness
androgenic alopecia
What is the arrector pili muscle?
the small involuntary muscle in the base of the hair follicle.
55%
COHNS
Carbon
oxygen
hydrogen
nitrogen
sulfur
Does white hair contain melanin
No
The disorder that affect the hair follicles to be mistakenly attacked by a persons own immune system.
alopecia areata
What are the three main layers of the hair shaft?
Cuticle
Cortex
Medulla
Which on has a medulla Vellus or terminal Hair
Terminal hair
What makes up 90% of the hair
Name 4 types of wave patterns
straight,
wavy
curly
extremely curly
What is the difference between alopecia totalis and alopecia universalis
totalis - total loss of hair on scalp
Universalis complete loss of hair of the body
What do all male beard contain
A medulla
During what phase does the follicle shrink and detaches from the derma papilla
Catagen phase
How much percentage does carbon, oxygen, and nitrogen have in the hair ?
Carbon 51%
Oxygen 21%
Nitrogen 17%
Individuals who have curly hair typical have what kind of hair in the crown
straight
Name two hair loss treatments approved by the FDA
minoxidil and finasteride
5 structures of the hair root
The hair follicle
The hair bulb
The derma papilla
The arrector pili muscle
Sebaceous Glands
What are the Three phases of hair growth
anagen
catagen
telogen
Strength - weak physical
Broken by changes in PH
Reformed by Normalizing PH
Name the side bond
Salt bond
Whats another name for coiled hair
Extremly curly hair
What is the process called that consist of removing thick hair from one area to a thinner part of the hair
hair transplant