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Questions and Answers
What is located at the bottom of the follicle and supplies nourishment to the germinal matrix?
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?
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?
Which of the following terms is known as the active growing stage of hair?
What is referred to as the resting stage of hair growth when the hair bulb has no attached root sheath?
What is referred to as the resting stage of hair growth when the hair bulb has no attached root sheath?
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Hair that is 90% cortex and 10% cuticle is considered to be more what compared to hair that is 60% cortex and 40% cuticle?
Hair that is 90% cortex and 10% cuticle is considered to be more what compared to hair that is 60% cortex and 40% cuticle?
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What causes gray hair?
What causes gray hair?
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What type of melanin produces brown/black hair color?
What type of melanin produces brown/black hair color?
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Where do people with lighter colored hair have melanin?
Where do people with lighter colored hair have melanin?
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What are the three major layers of the hair?
What are the three major layers of the hair?
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What can stimulate the onset of the telogen stage or cause the production of abnormal, brittle hairs?
What can stimulate the onset of the telogen stage or cause the production of abnormal, brittle hairs?
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In which part of the hair is melanin found mainly?
In which part of the hair is melanin found mainly?
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What is the technical term for the study of hair?
What is the technical term for the study of hair?
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What influences the large variety of hair color?
What influences the large variety of hair color?
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Oil glands are attached to the side of which part of the hair?
Oil glands are attached to the side of which part of the hair?
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What are the two primary parts of hair?
What are the two primary parts of hair?
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The diameter of a hair fiber will be the same as what?
The diameter of a hair fiber will be the same as what?
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During which stage of hair growth is hair color darker?
During which stage of hair growth is hair color darker?
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In which area of the hair bulb does mitosis take place?
In which area of the hair bulb does mitosis take place?
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What does keratinization involve?
What does keratinization involve?
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Where is the pigment that gives hair its color primarily found?
Where is the pigment that gives hair its color primarily found?
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Which of the following resembles the shape of a golf club?
Which of the following resembles the shape of a golf club?
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What is gray hair sometimes referred to as?
What is gray hair sometimes referred to as?
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What is the resting stage of hair growth when the hair bulb has no attached root sheath called?
What is the resting stage of hair growth when the hair bulb has no attached root sheath called?
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What determines the shape of the hair shaft as it grows from the hair follicle?
What determines the shape of the hair shaft as it grows from the hair follicle?
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What is the role of the papilla in the hair follicle?
What is the role of the papilla in the hair follicle?
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What do various hair loss measurement systems identify?
What do various hair loss measurement systems identify?
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What is the premature shedding of hair in the resting stage called?
What is the premature shedding of hair in the resting stage called?
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In humid regions, what may hair need?
In humid regions, what may hair need?
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Dry flakes attached to the scalp or on the hair are called what?
Dry flakes attached to the scalp or on the hair are called what?
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Which of the following refers to the total loss of hair on the scalp?
Which of the following refers to the total loss of hair on the scalp?
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What can excessive friction created by backcombing cause?
What can excessive friction created by backcombing cause?
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What hair problem may be caused by an inherited defect in the hair's keratin protein structure?
What hair problem may be caused by an inherited defect in the hair's keratin protein structure?
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Around what time is short, fine, non-pigmented hair replaced with terminal hair?
Around what time is short, fine, non-pigmented hair replaced with terminal hair?
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What do the cuticle layers protect?
What do the cuticle layers protect?
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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.
Studying That Suits You
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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.
