Trichology

The pigment that gives hair its color is found primarily in the:

• cortex
• cuticle
• papilla
• medulla

The process of hair turning grey is usually caused by:

• the natural aging process
• hair damaged at the papilla
• hair fiber over 15 years in age
• being exposed to excessive sunlight

Which of the following is the hard, resistant layer of protein that protects the hair shaft?

• cortex
• cuticle
• papilla
• medulla

The outer covering of the hair shaft made up of overlapping layers of transparent scaled is called the:

• cortex
• cuticle
• papilla
• medulla

The resting state of hair growth when the hair bulb has no attached root sheath is referred to as the:

• active stage
• telogen stage
• anagen stage
• catagen stage

The muscle that causes hair to stand on end when a person is scared or cold is known as the:

• cuticle
• papilla
• medulla
• arrector pili

The lips, soles of the eet, palms of the hands, and eyelids do not have:

• hair
• cells
• nerves
• muscles

Human hair on average, grows about:

• 1/4" per month
• 1/2" per month
• 1" per month
• 1 1/2" per month

Which o the following refers to the ability of hair to stretch and return to its original shape without breaking?

• texture
• porosity
• elasticity
• breaking point

Hair is made up of a protein, what is this protein called?

• Coronin

• Gloverin

• Keratin

• Myosin