Hair Anatomy Chapter 7 Flashcards

Questions and Answers

What is located at the bottom of the follicle and supplies nourishment to the germinal matrix?

papilla

What is the layer of hair that consists of unique protein structures giving hair most of its pigment and strength?

cortex

Which of the following terms is known as the active growing stage of hair?

Anagen stage (correct)

Exogen stage

Telogen stage

Catagen stage

What is referred to as the resting stage of hair growth when the hair bulb has no attached root sheath?

telogen stage Signup and view all the answers

Hair that is 90% cortex and 10% cuticle is considered to be more what compared to hair that is 60% cortex and 40% cuticle?

elastic Signup and view all the answers

What causes gray hair?

reduced color pigment, melanin, in the cortex layer of the hair Signup and view all the answers

What type of melanin produces brown/black hair color?

eumelanin Signup and view all the answers

Where do people with lighter colored hair have melanin?

cortex only Signup and view all the answers

What are the three major layers of the hair?

Cuticle Signup and view all the answers

What can stimulate the onset of the telogen stage or cause the production of abnormal, brittle hairs?

disease and medication Signup and view all the answers

In which part of the hair is melanin found mainly?

Cortex Signup and view all the answers

What is the technical term for the study of hair?

trichology Signup and view all the answers

What influences the large variety of hair color?

eumelanin and pheomelanin Signup and view all the answers

Oil glands are attached to the side of which part of the hair?

root sheath or follicle Signup and view all the answers

What are the two primary parts of hair?

hair fiber and hair root Signup and view all the answers

The diameter of a hair fiber will be the same as what?

the inside diameter of the hair follicle Signup and view all the answers

During which stage of hair growth is hair color darker?

Anagen stage Signup and view all the answers

In which area of the hair bulb does mitosis take place?

germinal matrix Signup and view all the answers

What does keratinization involve?

Forming the medulla Signup and view all the answers

Where is the pigment that gives hair its color primarily found?

Cortex Signup and view all the answers

Which of the following resembles the shape of a golf club?

Hair bulb Signup and view all the answers

What is gray hair sometimes referred to as?

mottled hair Signup and view all the answers

What is the resting stage of hair growth when the hair bulb has no attached root sheath called?

telogen stage Signup and view all the answers

What determines the shape of the hair shaft as it grows from the hair follicle?

The shape of the follicle Signup and view all the answers

What is the role of the papilla in the hair follicle?

Supplying nourishment to the germinal matrix Signup and view all the answers

What do various hair loss measurement systems identify?

pattern and density of the hair loss Signup and view all the answers

What is the premature shedding of hair in the resting stage called?

Telogen effluvium Signup and view all the answers

In humid regions, what may hair need?

protein conditioning Signup and view all the answers

Dry flakes attached to the scalp or on the hair are called what?

pityriasis capitis simplex Signup and view all the answers

Which of the following refers to the total loss of hair on the scalp?

Alopecia areata totalis Signup and view all the answers

What can excessive friction created by backcombing cause?

pilica polonica Signup and view all the answers

What hair problem may be caused by an inherited defect in the hair's keratin protein structure?

trichorrhexis nodosa Signup and view all the answers

Around what time is short, fine, non-pigmented hair replaced with terminal hair?

puberty Signup and view all the answers

What do the cuticle layers protect?

the cortex of the hair strand Signup and view all the answers

Study Notes

Hair Structure and Growth Stages

Papilla provides nourishment to the germinal matrix and is located at the bottom of the hair follicle.
The cortex contains unique protein structures, granting hair its color and strength, primarily from its elasticity.
Anagen stage is recognized as the active growth period for hair.
Telogen stage indicates a resting phase of hair growth where the hair bulb lacks an attached root sheath.
Hair with 90% cortex and 10% cuticle is more elastic compared to hair with 60% cortex and 40% cuticle.
Gray hair results from reduced melanin in the cortex layer.

Melanin and Hair Color

Eumelanin is responsible for brown and black hair coloration.
People with lighter hair have melanin located primarily in the cortex.
The variety of hair color stems from the amount, size, and distribution of eumelanin and pheomelanin.

Hair Anatomy

The three main hair layers are medulla, cortex, and cuticle.
Melanin is predominantly located in the cortex, affecting overall hair pigmentation.
The hair bulb resembles a golf club shape and is key in hair formation.

Hair Disorders and Conditions

Hair loss can be measured through various systems that indicate patterns and density.
Telogen effluvium refers to premature hair shedding occurring during the resting stage, often due to influences like childbirth or fever.
Pityriasis capitis simplex represents dry flakes commonly found attached to the scalp or hair.
Alopecia areata totalis refers to complete hair loss on the scalp.

Hair Treatment and Care

In humid climates, hair may require protein conditioning to maintain health.
Excessive friction from practices like backcombing can lead to pilica polonica.
Trichorrhexis nodosa is a hair condition arising from inherited keratin structure defects.

Other Important Concepts

Short, fine, non-pigmented hair transitions to terminal hair during puberty.
The cuticle serves as a protective layer for the cortex of the hair strand.
The inside diameter of the hair follicle corresponds to the diameter of the hair fiber.

Hair Growth Factors

The follicle's shape directly affects the hair shaft's shape as it emerges.
Oil glands are linked to the hair follicle, contributing to the overall hair health.

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Description

Test your knowledge on hair anatomy with flashcards focused on Chapter 7. This quiz includes essential terminology such as 'papilla' and 'cortex', defining key parts and stages of hair growth. Perfect for students studying cosmetology or biology.