Hair Conditions
How many scale layers does the cuticle have?
7 to 12 layers
Ability of hair to absorb moisture, liquids, or chemicals
What is porosity?
The outer covering of the hair shaft
The central core of the hair shaft
What is the medulla?
Most common form of hair loss
What is Androgenetic Alopecia?
What results from incorrect use of salon tools?
Mechanical damage
Determine the three different hair types
Fine, medium, and coarse
The type of melanin that produces brown/black hair
What is Eumelanin?
The phase of growth where the hair is actively growing
What is the anagen phase?
Short, fine, non-pigmented hair that replaces lanugo hair i.e. peach fuzz
What is vellus hair?
Abnormal coverage of hair on area of the body
What is hypertrichosis?
Number of active hair follicles per square inch on the scalp
The total lack of pigmentation in the hair and skin
What is albinism?
The transitional phase of hair growth
What is the catagen phase?
Baldness that occurs early in life
What is Alopecia Prematura?
Naturally occurring microscopic fungus that is the leading cause of dandruff
What is malassezia?
Fill in the blank: After testing for structural strength of the hair, of the hair returns to its curl pattern completely it is in _______ but if the hair returns only 50% or less, the hair is ______.
Good condition; weak
Type of melanin that produces red or yellow hair
What is Pheomelanin?
The resting phase of hair growth
What is the Telogen phase?
Hair loss from excessive pulling or twisting
What is traction or traumatic Alopecia?
List the 5 external parasites
Ringworm, ringworm of the scalp, honeycomb ringworm, itch mite, and head lice
Fill in the blank: Acid mantle lubriates the outermost layer of the cuticle and reduces ______.
Friction
The muscle that causes hair to stand on end when a person is scared or cold.
What is the arrector pili muscle?
The process of cells changing shape, drying out, and forming keratin
What is keratinization?
An autoimmune disease where there is suddenly a loss of hair in round or irregular patches
What is Alopecia Areata?