Analyze This
This is the thickness or diameter of an individual hair strand.
Texture
These are the two parts of a strand of human hair.
Root and Shaft
These are the three phases of hair growth cycle.
Anagen
Catagen
Telogen
Hair is composed primarily of this protien.
keratin
This is also known as the hair's pith or core.
Medulla
This is the ability of the hair to absorb moisture.
Porosity
The cuticle, the cortex and the medulla are all layers of this.
Hair shaft
This is what your hair growth rate is determined by.
Genetics
Hair is composed of approximately this percentage of protien.
90%
This is the involuntary muscle attached to the hair follicle that causes goosebumps.
Arrector pili
This is the measurement used to describe the number of hairs per square inch.
Density
The hair bulb, the hair follicle, and the dermal papilla are all the _____________ portions of hair ___________ the skin.
Living/ Below
This is the phase of the hair growth cycle in which the follicle canal shrinks and detaches from the dermal papilla.
Catagen phase
As amino acids are linked by peptide bonds, they form a long chain which is called this.
Polypeptide chain
If you had inactive sebaceous glands, it would probably result in this.
Dry scalp
This type of hair has the largest diameter and may require longer processing times.
Coarse hair
This is the part of the root structure that contains blood vessels that supply nutrients that allow hair to grow.
Dermal papilla
This is the phase of the hair growth cycle in which the hair sheds.
Telogen
The hair's cortex is made up of these three types of cross-linked side bonds.
Hydrogen bond
Salt bond
Disulfide bond
Terminal, lanugo and vellus are all types of this.
Body hair types
Hold a strand of hair securely with one hand and use the thumb and forefinger of the other hand to slide from the end of the hair to the scalp in order to measure this.
Porosity
Hair is made up of the following substances that are represented by the acronym COHNS.
Carbon
Oxygen
Hydrogen
Nitrogen
Sulfur
If you have a client who complains that their hair stops growing just past their shoulders, you should assume that this is shorter in them than the average, not allowing their hair to grow longer.
the Anagen phase
Within the polypeptide chain, the disulfide bond joins the sulfur atoms of these.
2 neighboring cysteine amino acids
These are the two types of melanin located within the cortex.
*For bonus points tell me which one is responsible for what.
Eumelanin- brown and black pigment
Pheomelanin- yellow to red pigment