102b.14 - Hair Theory Flashcards
Reviews questions in lesson challenge
When looking through a microscope, which portion of the hair would display living cells
Hair bulb
Hair grows from a tube-like “pocket” called a root sheath or a(n):
Follicle
The follicle in straight hair is typically:
Round
The hair follicle that produces tightly curled hair is typically:
Elliptical
Located at the bottom of the follicle and supplying nourishment to the germinal matrix is the:
Papilla
The outer covering of the hairstrand made up of overlapping layers of transparent scales is called the:
Cuticle
The layer of hair consisting of unique protein structures that give the hair most of its pigment and strength (elasticity) is called the:
Cortex
Hair that has been pulled out from the roots will grow back under which of the following circumstances?
The papilla has not been destroyed
What helps prevent the hair and skin from becoming too dry?
Sebum
What is formed when sebum produced by the oil glands mixes with the body’s perspiration?
Acid mantle
The muscle that causes the hair to stand on end when a person is scared or cold is known as the:
Arrector pili
Which of the following terms is known as the active growing stage of hair?
Anagen stage
Catagen, a brief transitional stage of hair growth, lasts for what amount of time?
only a few weeks
The resting stage of hair growth when the hair bulb has no attached root sheath is referred to as the:
Telogen stage
The lips, soles of the feet, palms of the hands and eyelids do not have:
Hair
Hair that is 90% cortex and 10% cuticle when compared to hair that is 40% cuticle would be considered to be :
More elastic
What is the total lack of pigmentation in the hair and skin called?
Albinism
Gray hair is caused by a(n):
Reduced color pigment, melanin in the cortex layer of the hair
Eumelanin is the type of melanin that produces:
Brown/black hair color
People with lighter colored hair have melanin in the:
Cortex only
